Correct Answer: (4) Non-Cooperation Movement
Solution:(4) The Noncooperation and Khilafat movements together unleashed a surge of popular action that was altogether unprecedented in British India. Students stopped going to colleges run by the government; lawyers refused to attend court; the working class went on strike in many towns and cities: according to official figures, there were 396 strikes in 1921. involving 600,000 workers and a loss of seven million workdays. Meanwhile, the countryside was seething with discontent. Hill tribes in northern Andhra violated the forest laws; farmers in Awadh did not pay taxes; peasants refused to carry loads for colonial officials. As a consequence of the noncooperation movement, the British raj was shaken to its foundations for the first time since the Great Revolt of 1857 (Source: Makers of Modern Asia, edited by Ramachandra Guha).