Udham Singh assassinated Which Lieutenant Governor? The Lieutenant Governor endorsed General Reginald Dyer's action regarding the Amritsar massacre.
Udham Singh: Udham Singh (26 December 1899 – 31 July 1940) was an Indian revolutionary best known for assassinating Michael O'Dwyer, the former Lieutenant Governor of the Punjab in British India, on 13 March 1940. Michael O'Dwyer: Sir Michael Francis O'Dwyer (28 April 1864 – 13 March 1940) was Lieutenant Governor of the Punjab in India from 1912 until 1919. Michael O'Dwyer:  O'Dwyer endorsed General Reginald Dyer's action regarding the Amritsar massacre and termed it a "correct action".
Sir Michael Francis O'Dwyer