Who drafted the Congress Enquiry Committee Report on the Jallianwala Bagh Massacre?

Who from the following killed Michael O' Dwyer responsible for Jallianwala Bagh massacre?

The massacre of the crowd at Jallianwala Bagh at Amritsar took place on :

The Jallianwala Bagh Massacre happened in the context of which Gandhian Satyagraha?

Who resigned from the membership of Viceroy’s Executive Council as a protest against Jallianwala Bagh Massacre?

Who among the following was not the member of Champaran Agrarian Enquiry Committee?