Q. Where did the so-called 'Black Hole Tragedy' take place?
Answer: Calcutta
Notes: Fort William at Calcutta was besieged on June 15, 1756 by Nawab of Bengal Siraj-ud-daula and he captured it. The nawab's attack on Calcutta (now Kolkata) resulted in the Black Hole of Calcutta incident, in which a number of English captives suffocated in a jail cell. English prisoners at Calcutta were lodged in a prison room of the fort. After putting up a weak resistance, the fort surrendered on June 20, and on that night occurred the “Black Hole” incident. The room was very small and so only 23 out of 146 prisoners survived the next day.