The correct answer is option 1, Clement Attlee. Clement Attlee, a member of the Labour Party, was the British Prime Minister when India was granted independence. Attlee served as Prime Minister from 1945 to 1951. During his tenure, the Indian Independence Act of 1947 was passed, which led to the partition of British India into two separate countries - India and Pakistan. Attlee and his government played a significant role in the negotiations and decision-making process that eventually led to the independence of India. Winston Churchill, option 2, was the British Prime Minister during World War II but was not in office when India gained independence. Ramsay MacDonald, option 3, served as Prime Minister in the 1920s and 1930s and was not in power when India became independent. William Pitt, option 4, was a British statesman who served as Prime Minister in the late 18th century and was not involved in the granting of Indian independence.