Q. The “black hole tragedy” was associated with which of the following?

[A] Shuja-ud-Daula

[B] Siraj-ud-daula

[C] Mir Jafar

[D] Murshad kuli khan

Answer: B
Notes:

Siraj-ud-daula is believed to have imprisoned 146 English persons (black hole tragedy) who were lodged in a very tiny room due to which 123 of them died of suffocation. 

Source: Spectrum Modern India.