Which one of the following statements about a Bill for Amendment of the Constitution of India is not correct ?

1. AIt is governed by Article 368(2) of the Constitution of India.
2. BJoint sitting can be resorted to for passing a Bill amending the Constitution of India.
3. CThe State Legislatures cannot initiate any Bill or proposal for amendment of the Constitution of India.
4. DThe previous sanction of the President of India is not required for introducing any Bill in the Parliament for amendment of the Constitution of India.