Detailed Solution:
The correct answer is “Both A and R are true and R is the correct explanation of A”.
During the Quit India Movement of 1942, the British and certain Muslim leaders, particularly under the leadership of Muhammad Ali Jinnah, saw the Congress as a common adversary.
The Muslim League and Muhammad Ali Jinnah opposed the movement. Also, there was no cooperation from the Communist Party and the Hindu Mahasabha.