Correct answer: B. 1945
Explanation: The direct answer is B, 1945. The Red Fort trials were court-martial-related proceedings against officers of the Indian National Army, including Shah Nawaz Khan, Prem Kumar Sahgal and Gurbaksh Singh Dhillon. The first major trial began in 1945 at the Red Fort after the Second World War. The INA had been associated with Subhas Chandra Bose and the struggle against British rule, so the trials produced strong nationalist feeling throughout India. Option A, 1943, is wrong because it relates to the period when the INA and the Provisional Government of Azad Hind were active, not the beginning of the Red Fort trials. Option B is correct because the trials began in 1945. Option C, 1946, is wrong as the trials had already begun; 1946 is associated with later public and military unrest, including the Royal Indian Navy uprising. Option D, 1947, is wrong because India became independent in that year and the first trials predated independence. Memory cue: INA trials at the Red Fort began after the war, in 1945.