At the historic Tripuri Session of the Congress (March 1939) Subhas Bose defeated Mahatma Gandhi's official candidate for the Presidentship of the Congress. Who was Gandhiji's nominee?
(a) Abdul Kalam Azad
(b) Jawaharlal Nehru
(c) Pattabhi Sitaramayya
(d) Vallabhbhai Patel