Explanation:

- CNR Rao has been chosen for the first Sheikh Saud International Prize for Materials Research. He is a renowned Indian chemist known for his work in solid-state and structural chemistry.

- Ashok Sen is an Indian theoretical physicist known for his contributions to string theory. He is also a recipient of various prestigious awards, but not this particular prize.

- Jayant Narlikar is an Indian astrophysicist famous for his work on cosmology and developing the conformal gravity theory.

- Raghunath Anant Mashelkar is a notable chemical engineer recognized for his extensive work in the field of research and innovation in India.

Your choice of CNR Rao is correct.