Question:medium

An indigenous nuclear submarine still under construction has been named as

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One of these was leased from Russia. The Indian built one, launched in 2009, has a Sanskrit name meaning slayer of enemies.
Updated On: Jul 17, 2026
  • Chakra
  • Sudarshan
  • Arihant
  • Ghaatak
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The Correct Option is C

Solution and Explanation

Two words in the stem do the work: indigenous, meaning built in India, and still under construction, meaning not yet commissioned in early 2012. Judge each option against both tests.

  1. Chakra: INS Chakra was very much in the news at this time, but it was an Akula class boat leased from Russia for ten years and commissioned into the Indian Navy in April 2012. It was built in a Russian yard, so it fails the indigenous test, and it was ready rather than under construction. This is the intended trap.
  2. Sudarshan: No Indian submarine carries this name. The word appears in other defence contexts but not here.
  3. Arihant: INS Arihant was the first nuclear powered submarine designed and built in India, under the Advanced Technology Vessel programme at the shipbuilding centre in Visakhapatnam. Manmohan Singh launched it in July 2009, and through 2012 it was still fitting out and running reactor and sea trials. The name is Sanskrit for slayer of enemies, and the boat was finally commissioned in 2016. It meets both tests.
  4. Ghaatak: This is not the name of any Indian submarine. It was later attached to a stealth unmanned combat aircraft project.

Option (C) is correct.

Let's summarize:

  • INS Arihant: India built, launched 2009, under trials in 2012, commissioned 2016.
  • INS Chakra: Russian built, leased, commissioned April 2012, so not indigenous.

So the indigenous nuclear submarine under construction was Arihant.

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