Which of the following statements about the Non-Cooperation Movement is/are correct? 1. It was marked by significant participation of peasants from Karnataka. 2. It was marked by non-Brahmin lower caste participation in Madras and Maharashtra. 3. It was marked by the lack of labour unrest in places like Assam, Bengal and Madras. 4. It was badly shaken by the Chauri Chaura incident in 1922 after which Gandhiji decided to continue with the movement on a much smaller scale. Select the correct answer using the code given below.