The Correct Answer is 1920.
Key Points
- The Non-Cooperation Movement was the beginning of the Gandhian Movement against the British.
- The non-co-operation campaign was inaugurated by Mahatma Gandhi on 1st August 1919.
- The Movement was initiated in support of the Khilafat Movement.
- The Movement started with strikes and processions all over India.
- On 4 September 1920, Congress met at Calcutta in a special session.
- This special session was presided by Lala Lajpat Rai.

