Explanation
- A
Amphibious warfare ship
Amphibious warfare ship. That class is LST/LPD such as INS Jalashwa, not Astradharini. This letter is not the key.
- B
Nuclear-powered submarine
Nuclear-powered submarine. India’s SSBN/SSN story is Arihant and later boats, not this name. This letter is not the key.
- C
Torpedo launch and recovery vessel
Torpedo launch and recovery vessel. INS Astradharini, commissioned in 2015 for NSTL/Visakhapatnam, is an indigenously built ship to launch and recover torpedoes during trials. That stored letter is the official key.
- D
Nuclear-powered aircraft carrier
Nuclear-powered aircraft carrier. India has no nuclear carrier; Vikramaditya/Vikrant are conventionally powered. This letter is not the key.
Summary. Official key is (c) torpedo launch and recovery vessel. INS Astradharini is a specialised trials ship, not an amphibious platform, nuclear submarine or nuclear carrier. Honour the stored letter (c).