History · Non-Cooperation Movement

With reference to the Non-Cooperation Movement, consider the following statements: I. It was the first countrywide mass movement launched under the leadership of Mahatma Gandhi. II. The movement sought the attainment of Swaraj through non-violent and constitutionally restrained methods of mass mobilisation. III. Rabindranath Tagore publicly criticised Gandhi for withdrawing the movement in the aftermath of the Chauri Chaura incident. IV. The arrest of Mahatma Gandhi on charges of sedition took place after the movement had been called off. How many of the above statements are correct?