Explanation:

On 5 February 1922, a clash took place at Chauri Chaura, a small town in the district of Gorakhpur, Uttar Pradesh. A police officer had attacked some volunteers picketing a liquor shop. A whole crowd of peasants that had gathered there went to the police chowki (station). The mob set fire to the police chowki with some 22 policemen inside it. Mahatma Gandhi felt that the revolt was veering off-course, and was disappointed that the revolt had lost its non-violent nature. He did not want the movement to degenerate into a contest of violence, with police and angry mobs attacking each other back and forth, victimizing civilians in between. Gandhi appealed to the Indian public for all resistance to end, went on a fast lasting 3 weeks, and called off the non-cooperation movement. Hence option 2nd is correct.