Latest Posts

<style>/*
<meta name='google-adsense-platform-account' content='ca-host-pub-1556223355139109'/>
<meta name='google-adsense-platform-domain' content='blogspot.com'/>

</head>
<body>
<!-- DO NOT DELETE Theme Core File -->
<noscript><iframe height='0' src='https://www.googletagmanager.com/ns.html?id=GTM-MV2BCCXL' style='display:none;visibility:hidden' width='0'></iframe></noscript>
<!-- DO NOT DELETE Theme Core File -->
*/</style>

<style>/*
<script type="text/javascript" src="https://www.blogger.com/static/v1/widgets/3430792906-widgets.js"></script>
<script type='text/javascript'>
window['__wavt'] = 'APlU3lyEBPdprJ6JyCu4I45p5MGa:1775029066337';_WidgetManager._Init('//www.blogger.com/rearrange?blogID\x3d5305999200946608046','//www.otiprakitik.com/search?updated-max\x3d2025-09-13T07:41:00-07:00\x26max-results\x3d4\x26reverse-paginate\x3dtrue','5305999200946608046');
_WidgetManager._SetDataContext([{'name': 'blog', 'data': {'blogId': '5305999200946608046', 'title': '\u0985\u09a4\u09bf\u09aa\u09cd\u09b0\u09be\u0995\u09c3\u09a4\u09bf\u0995 \u09ac\u09cd\u09b2\u0997 - Otiprakitik Blog', 'url': 'https://www.otiprakitik.com/search?updated-max\x3d2025-09-13T07:41:00-07:00\x26max-results\x3d4\x26reverse-paginate\x3dtrue', 'canonicalUrl': 'https://www.otiprakitik.com/search?updated-max\x3d2025-09-13T07:41:00-07:00\x26max-results\x3d4\x26reverse-paginate\x3dtrue', 'homepageUrl': 'https://www.otiprakitik.com/', 'searchUrl': 'https://www.otiprakitik.com/search', 'canonicalHomepageUrl': 'https://www.otiprakitik.com/', 'blogspotFaviconUrl': 'https://www.otiprakitik.com/favicon.ico', 'bloggerUrl': 'https://www.blogger.com', 'hasCustomDomain': true, 'httpsEnabled': true, 'enabledCommentProfileImages': true, 'gPlusViewType': 'FILTERED_POSTMOD', 'adultContent': false, 'analyticsAccountNumber': '', 'encoding': 'UTF-8', 'locale': 'bn', 'localeUnderscoreDelimited': 'bn', 'languageDirection': 'ltr', 'isPrivate': false, 'isMobile': false, 'isMobileRequest': false, 'mobileClass': '', 'isPrivateBlog': false, 'isDynamicViewsAvailable': true, 'feedLinks': '\x3clink rel\x3d\x22alternate\x22 type\x3d\x22application/atom+xml\x22 title\x3d\x22\u0985\u09a4\u09bf\u09aa\u09cd\u09b0\u09be\u0995\u09c3\u09a4\u09bf\u0995 \u09ac\u09cd\u09b2\u0997 - Otiprakitik Blog - Atom\x22 href\x3d\x22https://www.otiprakitik.com/feeds/posts/default\x22 /\x3e\n\x3clink rel\x3d\x22alternate\x22 type\x3d\x22application/rss+xml\x22 title\x3d\x22\u0985\u09a4\u09bf\u09aa\u09cd\u09b0\u09be\u0995\u09c3\u09a4\u09bf\u0995 \u09ac\u09cd\u09b2\u0997 - Otiprakitik Blog - RSS\x22 href\x3d\x22https://www.otiprakitik.com/feeds/posts/default?alt\x3drss\x22 /\x3e\n\x3clink rel\x3d\x22service.post\x22 type\x3d\x22application/atom+xml\x22 title\x3d\x22\u0985\u09a4\u09bf\u09aa\u09cd\u09b0\u09be\u0995\u09c3\u09a4\u09bf\u0995 \u09ac\u09cd\u09b2\u0997 - Otiprakitik Blog - Atom\x22 href\x3d\x22https://www.blogger.com/feeds/5305999200946608046/posts/default\x22 /\x3e\n', 'meTag': '\x3clink rel\x3d\x22me\x22 href\x3d\x22https://www.blogger.com/profile/13705826342141197489\x22 /\x3e\n', 'adsenseHostId': 'ca-host-pub-1556223355139109', 'adsenseHasAds': false, 'adsenseAutoAds': false, 'boqCommentIframeForm': true, 'loginRedirectParam': '', 'view': '', 'dynamicViewsCommentsSrc': '//www.blogblog.com/dynamicviews/4224c15c4e7c9321/js/comments.js', 'dynamicViewsScriptSrc': '//www.blogblog.com/dynamicviews/f510cf4f58a19ad4', 'plusOneApiSrc': 'https://apis.google.com/js/platform.js', 'disableGComments': true, 'interstitialAccepted': false, 'sharing': {'platforms': [{'name': '\u09b2\u09bf\u0999\u09cd\u0995 \u09aa\u09be\u09a8', 'key': 'link', 'shareMessage': '\u09b2\u09bf\u0999\u09cd\u0995 \u09aa\u09be\u09a8', 'target': ''}, {'name': 'Facebook', 'key': 'facebook', 'shareMessage': 'Facebook \u098f \u09b6\u09c7\u09df\u09be\u09b0 \u0995\u09b0\u09c1\u09a8', 'target': 'facebook'}, {'name': '\u098f\u099f\u09bf \u09ac\u09cd\u09b2\u0997 \u0995\u09b0\u09c1\u09a8!', 'key': 'blogThis', 'shareMessage': '\u098f\u099f\u09bf \u09ac\u09cd\u09b2\u0997 \u0995\u09b0\u09c1\u09a8!', 'target': 'blog'}, {'name': 'X', 'key': 'twitter', 'shareMessage': 'X \u098f \u09b6\u09c7\u09df\u09be\u09b0 \u0995\u09b0\u09c1\u09a8', 'target': 'twitter'}, {'name': 'Pinterest', 'key': 'pinterest', 'shareMessage': 'Pinterest \u098f \u09b6\u09c7\u09df\u09be\u09b0 \u0995\u09b0\u09c1\u09a8', 'target': 'pinterest'}, {'name': '\u0987\u09ae\u09c7\u09b2', 'key': 'email', 'shareMessage': '\u0987\u09ae\u09c7\u09b2', 'target': 'email'}], 'disableGooglePlus': true, 'googlePlusShareButtonWidth': 0, 'googlePlusBootstrap': '\x3cscript type\x3d\x22text/javascript\x22\x3ewindow.___gcfg \x3d {\x27lang\x27: \x27bn\x27};\x3c/script\x3e'}, 'hasCustomJumpLinkMessage': true, 'jumpLinkMessage': 'Read more \xbb', 'pageType': 'index', 'pageName': '', 'pageTitle': '\u0985\u09a4\u09bf\u09aa\u09cd\u09b0\u09be\u0995\u09c3\u09a4\u09bf\u0995 \u09ac\u09cd\u09b2\u0997 - Otiprakitik Blog', 'metaDescription': 'The first and so far, the only Bengali blog on supernatural events, mysteries, and the unknown. Enter the world of the unexplained at otiprakitik.com'}}, {'name': 'features', 'data': {}}, {'name': 'messages', 'data': {'edit': '\u09b8\u09ae\u09cd\u09aa\u09be\u09a6\u09a8\u09be', 'linkCopiedToClipboard': '\u09b2\u09bf\u0999\u09cd\u0995 \u0995\u09cd\u09b2\u09bf\u09aa\u09ac\u09cb\u09b0\u09cd\u09a1\u09c7 \u0995\u09aa\u09bf \u0995\u09b0\u09be \u09b9\u09df\u09c7\u099b\u09c7!', 'ok': '\u09a0\u09bf\u0995 \u0986\u099b\u09c7', 'postLink': '\u09b2\u09bf\u0999\u09cd\u0995 \u09aa\u09cb\u09b8\u09cd\u099f \u0995\u09b0\u09c1\u09a8'}}, {'name': 'template', 'data': {'name': 'custom', 'localizedName': '\u0995\u09be\u09b8\u09cd\u099f\u09ae', 'isResponsive': true, 'isAlternateRendering': false, 'isCustom': true}}, {'name': 'view', 'data': {'classic': {'name': 'classic', 'url': '?view\x3dclassic'}, 'flipcard': {'name': 'flipcard', 'url': '?view\x3dflipcard'}, 'magazine': {'name': 'magazine', 'url': '?view\x3dmagazine'}, 'mosaic': {'name': 'mosaic', 'url': '?view\x3dmosaic'}, 'sidebar': {'name': 'sidebar', 'url': '?view\x3dsidebar'}, 'snapshot': {'name': 'snapshot', 'url': '?view\x3dsnapshot'}, 'timeslide': {'name': 'timeslide', 'url': '?view\x3dtimeslide'}, 'isMobile': false, 'title': '\u0985\u09a4\u09bf\u09aa\u09cd\u09b0\u09be\u0995\u09c3\u09a4\u09bf\u0995 \u09ac\u09cd\u09b2\u0997 - Otiprakitik Blog', 'description': 'The first and so far, the only Bengali blog on supernatural events, mysteries, and the unknown. Enter the world of the unexplained at otiprakitik.com', 'url': 'https://www.otiprakitik.com/search?updated-max\x3d2025-09-13T07:41:00-07:00\x26max-results\x3d4\x26reverse-paginate\x3dtrue', 'type': 'feed', 'isSingleItem': false, 'isMultipleItems': true, 'isError': false, 'isPage': false, 'isPost': false, 'isHomepage': false, 'isArchive': false, 'isSearch': true, 'isLabelSearch': false, 'search': {}}}, {'name': 'widgets', 'data': [{'title': 'Upload Image', 'type': 'Image', 'sectionId': 'upload-image', 'id': 'Image10'}, {'title': 'Logo', 'type': 'HTML', 'sectionId': 'header-main', 'id': 'HTML10'}, {'title': 'Icons, Dark, Search', 'type': 'LinkList', 'sectionId': 'header-main', 'id': 'LinkList10'}, {'title': 'Menu', 'type': 'LinkList', 'sectionId': 'header-main', 'id': 'LinkList11'}, {'title': '\u09ac\u09cd\u09b2\u0997 \u09aa\u09cb\u09b8\u09cd\u099f\u0997\u09c1\u09b2\u09bf', 'type': 'Blog', 'sectionId': 'blog-post', 'id': 'Blog1', 'posts': [{'id': '3510828224852087594', 'title': ' \u0985\u09a4\u09bf\u09aa\u09cd\u09b0\u09be\u0995\u09c3\u09a4\u09bf\u0995 \u09ae\u09be\u09a8\u09b8\u09bf\u0995 \u0995\u09cd\u09b7\u09ae\u09a4\u09be\u0997\u09c1\u09b2\u09cb \u09af\u09c7\u09ad\u09be\u09ac\u09c7 \u09aa\u09cd\u09b0\u0995\u09be\u09b6 \u09aa\u09be\u09df  ', 'featuredImage': 'https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjdGrQJ94HGb4JKG1rrSuPgAdyB7Ocza9ThM23cG3my_wKKcNS2bhohAiwhggP1J1QFb4TDvdra13GrDNJkKsm7blurAfYmSij70c8PSzJt2vLBPek9HbJajsyIhrX8WD24nWaU9GVz4bTLxb3PfgXju6Uzjm-9jAMGkeeTCr752s68UIymVZCBLT4b2LE/s16000/%E0%A6%85%E0%A6%A4%E0%A6%BF%E0%A6%AA%E0%A7%8D%E0%A6%B0%E0%A6%BE%E0%A6%95%E0%A7%83%E0%A6%A4%E0%A6%BF%E0%A6%95%20%E0%A6%AE%E0%A6%BE%E0%A6%A8%E0%A6%B8%E0%A6%BF%E0%A6%95%20%E0%A6%95%E0%A7%8D%E0%A6%B7%E0%A6%AE%E0%A6%A4%E0%A6%BE%E0%A6%97%E0%A7%81%E0%A6%B2%E0%A7%8B%20%E0%A6%AF%E0%A7%87%E0%A6%AD%E0%A6%BE%E0%A6%AC%E0%A7%87%20%E0%A6%AA%E0%A7%8D%E0%A6%B0%E0%A6%95%E0%A6%BE%E0%A6%B6%20%E0%A6%AA%E0%A6%BE%E0%A7%9F-%E0%A7%A7.webp', 'showInlineAds': false}, {'id': '5609512934343469610', 'title': '\u09ac\u09bf\u09ad\u09bf\u09a8\u09cd\u09a8 \u09b8\u09ad\u09cd\u09af\u09a4\u09be\u09df \u09ae\u09b9\u09be\u09aa\u09cd\u09b2\u09be\u09ac\u09a8\u09c7\u09b0 \u09ac\u09b0\u09cd\u09a8\u09a8\u09be ', 'featuredImage': 'https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgOWVPexc7Q2Q9XZBpuNv6fQlZAp2KCnzNGkb_Rn7mierVBd_l34ikGcBBKXt__D4lWTCTXa6aJ_M9Sz-5soZUbGpQXmWVx0iTFb1KF6V6c0_3bsFjBbhC9ct20kJ6KrTlOcm5zNNde-rLR7kJBWbGWGU-BpSRb3sEGY9KhcSoy63hUYY9I1U2kxsc9It8/s16000/%E0%A6%AC%E0%A6%BF%E0%A6%AD%E0%A6%BF%E0%A6%A8%E0%A7%8D%E0%A6%A8%20%E0%A6%B8%E0%A6%AD%E0%A7%8D%E0%A6%AF%E0%A6%A4%E0%A6%BE%E0%A7%9F%20%E0%A6%AE%E0%A6%B9%E0%A6%BE%E0%A6%AA%E0%A7%8D%E0%A6%B2%E0%A6%BE%E0%A6%AC%E0%A6%A8%E0%A7%87%E0%A6%B0%20%E0%A6%AC%E0%A6%B0%E0%A7%8D%E0%A6%A8%E0%A6%A8%E0%A6%BE-%E0%A7%A7.webp', 'showInlineAds': false}, {'id': '2654577772594363437', 'title': '\u09b8\u09a4\u09cd\u09af\u09bf\u0995\u09be\u09b0\u09c7\u09b0 \u099c\u09be\u09a6\u09c1 ', 'featuredImage': 'https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhv1VDVyasILV_tKB85-3qcBuKykFK7qWjFDw3WS0YM1RwOzorPnXWznFVgnHpjNIN6GS-bEIRPuZYBDOJt12CJQNQ0v1lpUEN_dlaUMW9U-Iokx5jvPODDhE3JTM4XVb_s8ZL8RoQ-JG3T8hZaa4TBes4tTxYgoz4Sx2QvEDKZTSg2iX3WCkEysF2QdnI/s16000/%E0%A6%B8%E0%A6%A4%E0%A7%8D%E0%A6%AF%E0%A6%BF%E0%A6%95%E0%A6%BE%E0%A6%B0%E0%A7%87%E0%A6%B0%20%E0%A6%9C%E0%A6%BE%E0%A6%A6%E0%A7%81-%E0%A7%A7.webp', 'showInlineAds': false}, {'id': '4888496094189756240', 'title': '\u09a6\u09bf\u09af\u09bc\u09be\u09a4\u09b2\u09ad \u09aa\u09be\u09b8 \u0998\u099f\u09a8\u09be\u0983 \u0986\u09a7\u09c1\u09a8\u09bf\u0995 \u09af\u09c1\u0997\u09c7\u09b0 \u098f\u0995\u099f\u09bf \u0985\u09a8\u09cd\u09af\u09a4\u09ae \u09b0\u09b9\u09b8\u09cd\u09af ', 'featuredImage': 'https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiy0fJI8m42vdE0jqSIFxiJR4OAEXURQUzTj2zsdDmqAYG5qzb9ShzEk_Wrsd811orB8IGetOMtE2cQ0je2rQBdHIIkpKjjUsnc8Tuww0s4JeeodN-qasr5alc0tRzuD6x4-SphkTPLXcQsJZdJkPkOpESawr5YQ4lnSEF-_ZT-ySgY56mfLh5gtfeqLSk/s16000/dyatlov%20pass-4.webp', 'showInlineAds': false}], 'footerBylines': [{'regionName': 'footer1', 'items': [{'name': 'author', 'label': 'Author -'}, {'name': 'timestamp', 'label': 'd MMM, yyyy'}, {'name': 'comments', 'label': 'Comment'}, {'name': 'share', 'label': ''}]}, {'regionName': 'footer2', 'items': [{'name': 'labels', 'label': 'Tags'}]}], 'allBylineItems': [{'name': 'author', 'label': 'Author -'}, {'name': 'timestamp', 'label': 'd MMM, yyyy'}, {'name': 'comments', 'label': 'Comment'}, {'name': 'share', 'label': ''}, {'name': 'labels', 'label': 'Tags'}]}, {'title': '#Related Post List in BlogPost', 'type': 'HTML', 'sectionId': 'ads-post', 'id': 'HTML15'}, {'title': '\u0997\u09a4 \u09e6\u09ed \u09a6\u09bf\u09a8\u09c7\u09b0 \u099c\u09a8\u09aa\u09cd\u09b0\u09bf\u09df \u09aa\u09cb\u09b8\u09cd\u099f \u09b8\u09ae\u09c2\u09b9', 'type': 'PopularPosts', 'sectionId': 'sidebar-static', 'id': 'PopularPosts1', 'posts': [{'title': '\u09ac\u09bf\u09b6\u09cd\u09ac\u09c7\u09b0 \u09ac\u09bf\u09ad\u09bf\u09a8\u09cd\u09a8 \u09b8\u0982\u09b8\u09cd\u0995\u09c3\u09a4\u09bf\u09a4\u09c7 \u099c\u09be\u09a6\u09c1\u09ac\u09bf\u09a6\u09cd\u09af\u09be \u099a\u09b0\u09cd\u099a\u09be\u09b0 \u098f\u0995\u099f\u09bf \u09b8\u0982\u0995\u09cd\u09b7\u09bf\u09aa\u09cd\u09a4 \u09ac\u09bf\u09ac\u09b0\u09a8 ', 'id': 4982496500944388020}, {'title': '\u0985\u09cd\u09af\u09be\u09a8\u09cd\u099f\u09be\u09b0\u09cd\u0995\u099f\u09bf\u0995\u09be \u09ae\u09b9\u09be\u09a6\u09c7\u09b6 \u09a8\u09bf\u09df\u09c7 \u09ac\u09b9\u09c1\u09b2 \u09aa\u09cd\u09b0\u099a\u09b2\u09bf\u09a4 \u0995\u09bf\u099b\u09c1 \u09af\u09dc\u09af\u09a8\u09cd\u09a4\u09cd\u09b0 \u09a4\u09a4\u09cd\u09a4\u09cd\u09ac ', 'id': 5076694640359405795}, {'title': '\u09b8\u09a4\u09cd\u09af\u09bf\u0995\u09be\u09b0\u09c7\u09b0 \u099c\u09be\u09a6\u09c1 ', 'id': 2654577772594363437}, {'title': '\u0989\u0987\u0995\u09be \u09a7\u09b0\u09cd\u09ae\u0983 \u098f\u0995\u099f\u09bf \u09b8\u09be\u09b0\u09cd\u09ac\u09bf\u0995 \u09aa\u09b0\u09cd\u09af\u09be\u09b2\u09cb\u099a\u09a8\u09be ', 'id': 3696697801288821944}, {'title': '\u09aa\u09cd\u09b0\u099c\u09c7\u0995\u09cd\u099f \u098f\u09ae \u0995\u09c7 \u0986\u09b2\u099f\u09cd\u09b0\u09be - \u09ae\u09be\u09a8\u09c1\u09b7\u09c7\u09b0 \u09ae\u09a8\u0995\u09c7 \u09a8\u09bf\u09df\u09a8\u09cd\u09a4\u09cd\u09b0\u09a8 \u0995\u09b0\u09be\u09b0 \u098f\u0995 \u0997\u09cb\u09aa\u09a8 \u0997\u09ac\u09c7\u09b7\u09a8\u09be  ', 'id': 3872971519904568659}]}, {'title': '\u0993\u09df\u09c7\u09ac\u09b8\u09be\u0987\u099f \u0986\u09b0\u09cd\u0995\u09be\u0987\u09ad', 'type': 'BlogArchive', 'sectionId': 'sidebar-static', 'id': 'BlogArchive10'}, {'title': '\u0985\u09a4\u09bf\u09aa\u09cd\u09b0\u09be\u0995\u09c3\u09a4\u09bf\u0995 \u09ac\u09cd\u09b2\u0997 \u09b8\u09ae\u09cd\u09aa\u09b0\u09cd\u0995\u09c7', 'type': 'HTML', 'sectionId': 'footer-widget', 'id': 'HTML21'}, {'title': '\u0985\u09a4\u09bf\u09aa\u09cd\u09b0\u09be\u0995\u09c3\u09a4\u09bf\u0995 \u09ac\u09cd\u09b2\u0997\u09c7\u09b0 \u0989\u09a6\u09cd\u09a6\u09c7\u09b6\u09cd\u09af', 'type': 'HTML', 'sectionId': 'footer-widget', 'id': 'HTML1'}, {'title': 'Copyright', 'type': 'HTML', 'sectionId': 'copyright', 'id': 'HTML23'}, {'title': 'SVG Icons', 'type': 'HTML', 'sectionId': 'jet-options', 'id': 'HTML24'}]}]);
_WidgetManager._RegisterWidget('_ImageView', new _WidgetInfo('Image10', 'upload-image', document.getElementById('Image10'), {'resize': false}, 'displayModeFull'));
_WidgetManager._RegisterWidget('_HTMLView', new _WidgetInfo('HTML10', 'header-main', document.getElementById('HTML10'), {}, 'displayModeFull'));
_WidgetManager._RegisterWidget('_LinkListView', new _WidgetInfo('LinkList10', 'header-main', document.getElementById('LinkList10'), {}, 'displayModeFull'));
_WidgetManager._RegisterWidget('_LinkListView', new _WidgetInfo('LinkList11', 'header-main', document.getElementById('LinkList11'), {}, 'displayModeFull'));
_WidgetManager._RegisterWidget('_BlogView', new _WidgetInfo('Blog1', 'blog-post', document.getElementById('Blog1'), {'cmtInteractionsEnabled': false, 'lightboxEnabled': true, 'lightboxModuleUrl': 'https://www.blogger.com/static/v1/jsbin/2436852610-lbx__bn.js', 'lightboxCssUrl': 'https://www.blogger.com/static/v1/v-css/828616780-lightbox_bundle.css'}, 'displayModeFull'));
_WidgetManager._RegisterWidget('_HTMLView', new _WidgetInfo('HTML15', 'ads-post', document.getElementById('HTML15'), {}, 'displayModeFull'));
_WidgetManager._RegisterWidget('_PopularPostsView', new _WidgetInfo('PopularPosts1', 'sidebar-static', document.getElementById('PopularPosts1'), {}, 'displayModeFull'));
_WidgetManager._RegisterWidget('_BlogArchiveView', new _WidgetInfo('BlogArchive10', 'sidebar-static', document.getElementById('BlogArchive10'), {'languageDirection': 'ltr', 'loadingMessage': '\u09b2\u09cb\u09a1 \u09b9\u099a\u09cd\u099b\u09c7\x26hellip;'}, 'displayModeFull'));
_WidgetManager._RegisterWidget('_HTMLView', new _WidgetInfo('HTML21', 'footer-widget', document.getElementById('HTML21'), {}, 'displayModeFull'));
_WidgetManager._RegisterWidget('_HTMLView', new _WidgetInfo('HTML1', 'footer-widget', document.getElementById('HTML1'), {}, 'displayModeFull'));
_WidgetManager._RegisterWidget('_HTMLView', new _WidgetInfo('HTML23', 'copyright', document.getElementById('HTML23'), {}, 'displayModeFull'));
_WidgetManager._RegisterWidget('_HTMLView', new _WidgetInfo('HTML24', 'jet-options', document.getElementById('HTML24'), {}, 'displayModeFull'));
</script>
</body>*/</style>

অতিপ্রাকৃতিক মানসিক ক্ষমতাগুলো যেভাবে প্রকাশ পায়

বিভিন্ন সভ্যতায় মহাপ্লাবনের বর্ননা

সত্যিকারের জাদু

দিয়াতলভ পাস ঘটনাঃ আধুনিক যুগের একটি অন্যতম রহস্য

গত ০৭ দিনের জনপ্রিয় পোস্ট সমূহ

ওয়েবসাইট আর্কাইভ