- Assertion (A) states that Gandhi stopped the Non- cooperation Movement in 1922. This is true. Mahatma Gandhi announced the suspension of the Non-cooperation Movement in February 1922. - Reason (R) states that violence at Chauri-Chaura led him to stop the movement. This is true. The incident at Chauri-Chaura in Gorakhpur district (now in Uttar Pradesh) on February 5, 1922, saw a clash between police and protesters, which escalated into the protesters setting fire to a police station, killing several policemen. Gandhi was deeply disturbed by this act of violence, which violated the principle of non-violence central to his movement. - Reason (R) is the correct explanation for Assertion (A). The Chauri-Chaura incident served as the immediate trigger and justification for Gandhi's decision to call off the movement, as he felt the country was not ready for a completely non- violent struggle and that the movement was turning violent.