The correct option is A Bhagat Singh
Bhagat Singh was the principal secretary of the Hindustan Socialist Republican Association in 1929. Hindustan Socialist Republican Association (HSRA) was a revolutionary organisation, also known as the Hindustan Socialist Republican Army, established in 1928 at Feroz Shah Kotla in New Delhi by Chandrasekhar Azad, Ashfaqulla Khan, Bhagat Singh, Sukhdev Thapar and Jogesh Chandra Chatterjee.