The correct option is 2 and 3 only.
Explanation
Article 368 in Part XX of the Constitution deals with the powers of Parliament to amend the Constitution and the specific procedure required to do so. It establishes that the amendment process is a legislative function vested primarily in the Union Parliament.
Statement-wise Analysis:
- Statement 1 is Incorrect: The Constitution does not provide for any permanent "Constitution Commission" or a special constituent body to oversee amendments. The power to amend the Constitution is vested directly in the Parliament.
- Statement 2 is Correct: An amendment of the Constitution can be initiated only by the introduction of a bill for the purpose in either House of Parliament (Lok Sabha or Rajya Sabha). It cannot be introduced in the state legislatures.
- Statement 3 is Correct: State legislatures cannot initiate any bill or proposal for amending the Constitution. Their role is limited to ratifying specific amendments related to federal provisions, and this occurs only after the bill has been passed by the Parliament.
Key Takeaway:
The power to initiate a Constitutional Amendment Bill is the exclusive privilege of the Parliament; state legislatures have no power to initiate amendments.