The boundary between India and Pakistan was demarcated by

The correct answer is Sir Cyril Radcliffe.

Key Points

• After the partition of India on 17 August 1947, the "Radcliffe Line" became the border between India and Pakistan.
• The line was determined by the Border Commission headed by Sir Cyril Radcliffe.

Additional Information

• The Cripps Mission of 1942 was led by Sir Stafford Cripps alone, aiming to gain Indian support during World War II.
  The Cabinet Mission of 1946 included Pethick Lawrence, Stafford Cripps, and A.V. Alexander, and was focused on planning for the Indian independence.