As of May 2009, the Indian Judge in the UN Law of the Sea Tribunal is

The correct choice is: “Dr. P.C. Rao”

Dr P. Chandrasekhara Rao was India’s judge on the International Tribunal for the Law of the Sea (ITLOS) in Hamburg, set up under the UN Convention on the Law of the Sea, 1982. He was a member from the Tribunal’s start in 1996 until 2017 and was its President from 1999 to 2002.

“Dr. P.S. Rao” (Pemmaraju Sreenivasa Rao) served on the UN International Law Commission, “Mr. Justice Jagannath Rao” was a Supreme Court judge and chaired the Law Commission of India, and “Mr. Justice Rajendra Babu” was Chief Justice of India in 2004.