Question:

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

Step 1: Understanding the Question:
The question asks for the name of India's own nuclear submarine, one built in India and still being completed when the paper was set in early 2012.

Step 2: Key Formula or Approach:
Keep two things apart: a submarine built in India, and one taken on lease from another country. Only the first counts as indigenous.

Step 3: Detailed Explanation:
INS Arihant was the first nuclear powered submarine designed and built in India, under the Advanced Technology Vessel project at Visakhapatnam. It was launched in July 2009 by Prime Minister Manmohan Singh, and in early 2012 it was still fitting out and going through reactor and sea trials, so it was not yet commissioned. The name Arihant means "slayer of enemies" in Sanskrit. It was finally commissioned in 2016. So Arihant is the indigenous submarine under construction that the question describes.
Why the other options fail:
INS Chakra is the trap. It was a nuclear submarine of the Akula class taken on a ten year lease from Russia and commissioned into the Indian Navy in April 2012, so it was Russian built and not indigenous.
Sudarshan is not the name of any Indian submarine.
Ghaatak is not an Indian submarine either. The name was later used for an unmanned combat aircraft project.

Step 4: Final Answer:
The indigenous nuclear submarine under construction was INS Arihant, so option (C) is correct.
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