Hindustan Socialist Republican Association (HSRA) was a revolutionary organization, previously it was known as the Hindustan Republican Army, founded by Ram Prasad Bismil, Sachindra Nath Bakshi, Sachindranath Sanyal, and Jogesh Chandra Chatterjee. In 1928, the British government set up the Commission, headed by Sir John Simon, to report on the political situation in India. Responding to the rise in anti-colonial sentiment in 1928, the HRA became the Hindustan Socialist Republican Association, with the change of name probably being largely due to the influence of Bhagat Singh. Around the time of the Kakori robbery and the subsequent trial, various revolutionary groups had emerged in places such as Bengal, Bihar, and Punjab. These groups and the HRA met at Feroz Shah Kotla, in Delhi, on 8‚¬€œ9 September 1928, and from this emerged the HSRA. The socialist leanings voiced in the earlier HRA manifesto had gradually moved more towards Marxism and the HSRA spoke of a revolution involving a struggle by the masses to establish "the dictatorship of the proletariat" and the banishment of "parasites from the seat of political power". It saw itself as being at the forefront of this revolution, spreading the word and acting as the armed section of the masses. Its ideals were apparent in other movements elsewhere at that time, including incidents of communist-inspired industrial action by workers and the rural Kisan movement. At the request of Bhagat Singh, the newly-named HSRA resolved to bomb members of the Simon Commission and also to cease robbing rich people, the latter being a realization that the Kakori conspirators had suffered most from the evidence given by such people. Hence, the correct answer is Bhagat Singh.