Which of the following were the reasons behind the launch of the 'Non-cooperation movement'?
1. Jallianwala Bagh Massacre
2. Dissatisfaction with Montagu-Chelmsford Reforms
3. Rowlatt Act
4. Khilafat Agitation
1
1 and 3
2
2 and 4
3
1, 2 and 3
4
1, 2, 3 and 4
5
Question Not Attempted