The correct answer is option 1: Sagarika. Sagarika is a nuclear-capable submarine-launched ballistic missile (SLBM) developed by India. It is designed to be launched from submarines and to carry nuclear warheads.
Option 2, Shourya, is not a submarine-launched missile, but a land-based surface-to-surface missile developed by India. It is also capable of carrying nuclear warheads.
Option 3, Prithvi, is a surface-to-surface missile developed by India, but it is not capable of being launched from submarines.
Option 4, Nag, is an anti-tank guided missile developed by India. It is not a submarine-launched ballistic missile.
It is important to note that Sagarika is also known by its other name, K-15, and it is intended to be the mainstay of India`s strategic submarine fleet. Its capability of being launched from a submerged platform makes it a potent weapon for India`s defense forces.