RC Dutt (Romesh Chunder Dutt) was a civil servant and historian known for his work on Indian economic history, but he was not associated with the Azad Hind Fauj. The other options—General Mohan Singh (founder), Gurdial Singh Dhillon and Shah Nawaz Khan (prominent commanders)—were all key figures in the INA and were famously tried during the Red Fort trials in 1945. ANSWER: (B) R. C. Dutt