Let us arrange the events in the order they actually occurred:
- Jallianwala Bagh Massacre (1919) – A tragic event in Amritsar where British troops killed hundreds of unarmed civilians. II
- Gandhi-Irwin Pact (1931) – An agreement between Mahatma Gandhi and Lord Irwin to discontinue the Civil Disobedience Movement. IV
- Quit India Movement (1942) – A major civil disobedience movement launched by the Indian National Congress demanding an end to British rule. III
- Making of the Constituent Assembly (1946) – The body that was formed to draft the Constitution of India. I
Therefore, the correct chronological sequence is: II, IV, III, I.