Step 1: Understanding what “cession of territory” means.
Cession means transferring a part of Indian territory to another country, which affects sovereignty.
Step 2: The Berubari Case guidance.
The Supreme Court held that such transfer cannot be done merely by executive order.
A constitutional amendment or legislative action is required.
Step 3: The executive's role.
After the law is passed, the executive implements the actual transfer.
Step 4: Final conclusion.
Only Option (4) correctly includes both required steps.