Explanation:

- Raunak Sadhwani: He became the 65th Indian Grandmaster at the age of 13 in 2019. A young chess prodigy, Sadhwani achieved this title after a successful performance in international chess circuits.

- Rahul Vaid: There are no significant records or recognitions for Rahul Vaid becoming an Indian Grandmaster in chess. He might be mistaken with someone else or possibly not well-known for chess achievements.

- R Praggnanandhaa: A renowned Indian chess prodigy who became the world's second-youngest Grandmaster at the age of 12 in 2018. However, he is not the 65th Indian Grandmaster.

- Prithu Gupta: He became the 64th Indian Grandmaster in 2019 at the age of 15, achieving this title before Raunak Sadhwani.

- Correct Answer: Raunak Sadhwani