Explanation:

The Scorpene class submarines are conventional diesel-electric attack submarines designed by French naval defence and energy company DCNS and built by Mazagon Dock Limited (MDL) in India under Project $75$. They are known for their stealth capabilities, hence the moniker 'silent killer'. \nOption (A) INS Khanderi: INS Khanderi (S$21$) is the second submarine of the Kalvari-class (Scorpene-class) of diesel-electric attack submarines for the Indian Navy. It was commissioned into service in September $2019$. It is indeed known for its advanced stealth features. Therefore, this option is correct. \nOption (B) INS Kalvari: INS Kalvari (S$20$) is the lead boat of the Kalvari-class submarines. It was commissioned in December $2017$. While it is a 'silent killer', the question implies a more recent induction, and Khanderi was commissioned later than Kalvari. However, both are Scorpene-class. Given the options, Khanderi was a more recent induction at the time this question was likely framed (around late 2019/early 2020). Therefore, this option is less likely to be the *most recent* if multiple Scorpene submarines were inducted. \nOption (C) INS Karanj: INS Karanj (S$23$) is the third submarine of the Kalvari-class. It was commissioned in March $2021$. This would be a more recent induction than Khanderi or Kalvari. However, the provided correct answer is Khanderi, suggesting the question's context might be prior to Karanj's commissioning or it's a specific reference to Khanderi's induction period. If the question implies 'one of the recently inducted', Khanderi fits. \nOption (D) INS Vikrant: INS Vikrant is an Indigenous Aircraft Carrier (IAC-1), not a submarine. It is a surface warship designed to carry and operate fighter aircraft. Therefore, this option is incorrect. \nConsidering the provided correct answer, INS Khanderi was a significant and recent induction among the Scorpene class submarines at a certain point in time, known for its stealth capabilities.