Explanation:

Only statements 1&2 are correct.

• Article 253 of the Indian Constitution grants the Parliament the power to make any law for the whole or any part of the territory of India for implementing any treaty, agreement, or convention with any other country or countries or any decision made at any international conference, association, or other body.

• According to Article 253, the Parliament can legislate on subjects in the State List if it is necessary for implementing international agreements. This is an exception to the general division of powers between the Union and the States.

• Article 253 does not restrict the legislative power of the Parliament to only the Union List. Instead, it allows the Parliament to legislate on any subject, including those in the State List, if it is required to fulfill international obligations.

Hence option 2nd is correct.