In which context, did Gandhi insist, "no provocation can possibly justify (the) brutal murder of men who had been rendered defenceless, and who had virtually thrown themselves on the mercy of the mob"?

Chauri Chaura Incident

The correct answer is Option (2) → Chauri Chaura Incident

"Non-Cooperation Movement the British Raj was shaken to its foundations for the first time since the Revolt of 1857. Then, in February 1922, a group of peasants attacked and torched a police station in the hamlet of Chauri Chaura, in the United Provinces (now, Uttar Pradesh and Uttaranchal). Several constables perished in the conflagration. This act of violence prompted Gandhiji to call off the movement altogether. “No provocation,” he insisted, “can possibly justify (the) brutal murder of men who had been rendered defenceless and who had virtually thrown themselves on the mercy of the mob.”