​After which incident did Mahatma Gandhi call off the non-cooperation movement?​

Correct option is B

• Mahatma Gandhi had called Non-Cooperation Movement his ‘Himalayan Blunder' after the incident of Chauri Chaura.
• Chauri-Chaura: Chauri Chaura is a town in the Gorakhpur district of Uttar Pradesh. On 4th February 1922, this town witnessed a violent incident.
• A large crowd of peasants set on fire a police station that killed 22 policemen. Due to this incident, Mahatma Gandhi called off the Non-Cooperation Movement (1920-22).
• It involved the use of swadeshi and boycott of foreign goods, especially machine-made cloth, and legal, educational, and administrative institutions, "refusing to assist a ruler who misrules".