Explanation:

• Pro-changers : this group wanted to end the boycott of the legislative councils. they felt that if congress continued to boycott the elections, people would get elected and then the government would have absolute power to do anything it wanted. they wanted the congress to take part in the elections, join the government and then work to destroy the working of the legislatures from inside. the leaders were C.R. Das, Motilal Nehru and Vithalbhai Patel. Hence option 4th is correct.