Which one of the following leaders of the Congress was totally in favour of Cabinet Mission Plan?

The correct answer is Jawaharlal Nehru. While several leaders had reservations about the Cabinet Mission Plan of 1946, Nehru was its most prominent supporter within the Congress. He believed the plan provided a viable framework for a united India and a strong central government, which were his primary goals. Although he later gave a controversial speech regarding the power of the Constituent Assembly to change the plan, his initial stance was one of total favor as he saw it as the best path to achieve independence without partition. Sardar Patel and Maulana Azad also supported the plan, but Nehru is traditionally identified as the leader most strategically aligned with its implementation to ensure a transition of power.