Explanation:

- The demand for a Constitution drafted by Indians, without any interference from the British, was officially voiced by the Indian National Congress at its session.

- Option:1, 1939 – In 1939, major focus was on the Second World War and its repercussions; the main demand was about self-government and not constitution-making.

- Option:2, 1942 – The Quit India Movement was launched in 1942 demanding immediate British withdrawal, not specifically about the constitution.

- Option:3, 1935 – The Government of India Act, 1935 was a British law, not an Indian constitutional demand. Congress did not assert the demand for a constitution here.

- Option:4, 1929 – At the Lahore Session in 1929, under Jawaharlal Nehru’s leadership, the Congress demanded “Poorna Swaraj” (complete independence) and pressed for a constitution made by the people.

- Correct Answer: Option:4, 1929

- The 1929 Congress session was a turning point when the demand for a constitution framed without British intervention was officially made.