Solution:The Non-Cooperation Movement (Began in 1 August, 1920) was called off when peasants set fire to a police station in Chauri Chaura.
● The Chauri Chaura incident took place on February 5, 1922, during the Non-Cooperation Movement.
● A group of peasants clashed with the police in ChauriChaura, Uttar Pradesh, and set fire to a police station, killing 22 policemen.
● Mahatma Gandhi postponed the Non Cooperation Movement in 12 February, 1922.