Explanation:

- Option 1: Karambir Singh

- He was the Chief of the Naval Staff of the Indian Navy from May 2019 to November 2021.

- Not related to the Nepali Army's honorary rank.

- Option 2: MM Naravane

- He served as the Chief of the Army Staff of India from December 2019 to April 2022.

- He was indeed conferred the honorary rank of General of the Nepali Army in November 2020.

- Option 3: Bipin Rawat

- He was the first Chief of Defence Staff of India until his untimely demise in December 2021.

- Received honorary rank of General of the Nepali Army earlier, in the year 2017.

- Option 4: Rakesh Kumar Singh Bhadauria

- He was the Chief of the Air Staff of the Indian Air Force from September 2019 to September 2021.

- No connection with the honorary rank in question.