Detailed Solution:
The correct answer is “1 only”.
1) The Constitution of India does not provide any provision for a state to secede from the Union. The Indian Union is intended to be a perpetual union, and secession is not allowed.
2) While the freedom of expression is a fundamental right under Article 19 of the Indian Constitution, it is not absolute. Advocacy of secession can be restricted under reasonable limitations provided by law, especially if it poses a threat to national integrity or public order.