काल कोठरी ( ब्लैक होल ) की घटना , जिसमें 146 में से 123 लोग एक छोटी कोठरी में बंद कर दिए जाने के कारण मर गए थे , कहां घटी थी ? - Where did the dungeon (black hole) incident, in which 123 out of 146 people died due to being locked in a small cell, took place? - Kaal Kothri ( black Hole ) Ki Ghatna , Jisme 146 Me Se 123 Log Ek Chhoti Kothri Me Band Kar Diye Jane Ke Karan Mar Gaye The , Khan ghati Thi ? India History in hindi, Dhaka question answers in hindi pdf Munger questions in hindi, Know About Murshidabaad India History online test India History notes in hindi quiz book Calcutta