With reference to the Parliamentary government, which of the following features is/are correct?
1. President is both the head of the State and the head of government
2. Double membership
3. Dissolution of the lower house
4. Collective responsibility
1. 1 only
2. 1 and 2 only
3. 2, 3 and 4 only
4. 1, 2, 3 and 4