INS Mahe is an anti-submarine warfare (ASW) shallow-water craft commissioned into the Indian Navy in November 2025. Vessels of this kind are purpose-built for coastal and near-shore operations, equipped with sensors and weapons designed to detect and neutralise submarines operating in shallow littoral waters — a role that larger surface combatants designed for open-ocean warfare do not fully cover.

Ships of this class are typically indigenously designed and constructed, reflecting India's continuing push toward self-reliance in defence manufacturing rather than importing such vessels. Commissioning a ship of this type strengthens India's ability to guard its coastline, choke points, and harbour approaches against underwater threats, complementing the deep-water anti-submarine role played by larger destroyers and frigates.

To place this in context among the other options: the aircraft carrier named among the choices is an entirely different category of ship — India's first indigenously designed and built carrier, commissioned in September 2022, meant for power projection and air operations at sea rather than coastal anti-submarine work. Another shallow-water ASW craft mentioned belongs to the same broad family of coastal anti-submarine vessels but was commissioned earlier, in 2024. The remaining vessel named is a hydrographic survey ship, used for charting the seabed, tides, and currents to support safe navigation — it carries no combat or anti-submarine role at all.

Since the question specifically asks about a new warship commissioned in November 2025 for anti-submarine and coastal defence duties, INS Mahe is the correct match.