​From the given options, which is India's first indigenously built nuclear-armed submarine?​

Correct option is C

​The correct answer is (c) INS Arihant.

INS Arihant is India's first indigenously built nuclear-armed submarine. It was developed by the Indian Navy and is part of India's nuclear triad (the capability to launch nuclear weapons from land, air, and sea).

Information About Other Options:

• INS Chakra: This was a Russian nuclear-powered submarine leased to India.
• INS Kalvari: This is a conventional diesel-electric submarine, the first of the Scorpène-class submarines in service with the Indian Navy.
• INS Khukhri: This was a missile boat, not a nuclear submarine. It sank in the 1971 India-Pakistan war.

Information Booster:

Nuclear ballistic missile submarines (SSBN)

• Arihant-class submarines are being developed and built indigenously under the Advanced Technology Vessel (ATV) Project.
• India presently has two Nuclear ballistic missile submarines (SSBN):
• INS Arihant: Launched in 2009 and commissioned in 2018, it features a double-hull with advanced sensors, periscopes, and weapon systems, including strategic SLBMs.
• INS Arighat : It is India’s second indigenously built nuclear-powered ballistic missile submarine (SSBN commissioned on 29 August, 2024.