Which incident led Gandhiji to withdraw the Non-Cooperation Movement?

The correct answer is Option (2) → Chauri-Chaura episode

On 5 February 1922, at Chauri Chaura in the Gorakhpur district of the United Provinces (now Uttar Pradesh), a crowd of protesters set fire to the police station after the police fired on them, and 22 policemen were killed. Gandhiji held that the people were not yet ready for a non-violent struggle, and on 12 February 1922 he called off the Non-Cooperation Movement, which had begun in 1920.