Solution:Yogesh Chandra Chatterjee was one of the founder members of the Hindustan Republican Association. He was sentenced to life imprisonment in the Kakori Case (Kakori train action).In his book In Search of Freedom, he mentions that Pandit Motilal Nehru, under the leadership of Govind Ballabh Pant, formed the Kakori Case (Kakori train action day) Defence Committee.
In an article by Shankar Narayan Rao at the PIB website, it is mentioned that the President of the Defence Committee was Pandit Motilal Nehru. Initially, UPPSC considered option (d) as correct, but in its revised answer sheet, it supports option (b) as the correct answer.