Explanation:

- Bipin Rawat: He was not part of the Indian Navy. Instead, he served as the Chief of Army Staff and later became the first Chief of Defence Staff (CDS) of India.

- Sunil Lanba: He served as the 23rd Chief of the Naval Staff of the Indian Navy before retiring. He held the position before the current command.

- Bimal Verma: While he has had a distinguished career in the Navy, he was not appointed as the Chief of Naval Staff.

- Karambir Singh: He succeeded Sunil Lanba and became the 24th Chief of the Naval Staff of the Indian Navy. He assumed command on May 31, 2019.