Explanation:

Both statements 1&3 are correct.

• Nuclear Command Authority (NCA) is India’s nodal authority responsible for command, control and operational decisions regarding India’s nuclear weapons programme.
• It has Executive Council and Political Council. The Executive Council is chaired by the National Security Adviser (NSA). It gives inputs to the Political Council, which authorises a nuclear attack if need be.
• The Political Council is chaired by the Prime Minister and is advised by the Executive Council.
• The NCA’s directives are executed by the Strategic Forces Command. The strategic forces command (SFC) would be in charge of the nuclear forces’ administration and would be in charge of firing nuclear weapons.

Hence option 3rd is correct.