When did the Indian Independence Act receive the British royal assent ? 

July 1947 

The correct answer is Option 1- July 1947

The Indian Independence Act received the British royal assent on July 18, 1947.

The Act was passed by the British Parliament on July 5, 1947, and it partitioned British India into the two new independent dominions of India and Pakistan. The Act came into force on August 15, 1947, which is celebrated as Independence Day in both India and Pakistan.

The Indian Independence Act was a significant event in the history of India. It marked the end of British rule in India and the beginning of a new era of independence and self-determination for the Indian people.