Which Brigadier was associated with Jallianwala Bagh tragedy?

Answer: Option A

The Jallianwala Bagh massacre, also known as the Amritsar massacre, took place on 13 April 1919 when troops of the British Indian Army under the command of Colonel Reginald Dyer fired rifles into a crowd of Punjabis, who had gathered in Jallianwala Bagh, Amritsar, Punjab.