The Comptroller and Auditor General of India is a:

single-member body 

The correct answer is Option (3) - single-member body 

The Comptroller and Auditor General of India is a single-member body.

The CAG is a high-ranking official who heads the Indian Audit and Accounts Department. It's not a committee or a group, but a single individual responsible for overseeing financial audits of the government.