INS Rajput is a guided-missile destroyer of the Indian Navy, commissioned in 1980 as part of the Rajput-class. INS Shivalik (Option C) is a stealth frigate, INS Kirch (Option D) is a corvette, and INS Shankul (Option A) is also a corvette. Destroyers are larger, more heavily armed warships designed for fleet defense and anti-submarine warfare.