Correct Answer: (b) Tripuri Session, 1939
Solution:In the Haripura Session of Congress 1938, S.C. Bose was elected President (unopposed) for the first time. He was re-elected President in the Tripuri Session, 1939, defeating Pattabhi Sitaramayya supported by Gandhi. However, on the question of the formation of the Working Committee, a dispute between Gandhi and Bose surfaced. After that, Bose resigned, and Dr. Rajendra Prasad became President of Congress.