Exp) Option b is the correct answer

Statement a is correct.

The UPSC serves all or any of the needs of a state on the request of the state governor and with the approval of the President of India.

Statement b is incorrect.

The UPSC is not consulted while making reservations of appointments or posts in favour of any backward class of citizens or while taking into consideration the claims of scheduled castes and scheduled tribes in making appointments to services and posts.

Statement c is correct.

The UPSC assists the states (if requested by two or more states to do so) in framing and operating schemes of joint recruitment for any services for which candidates possessing special qualifications are required.

Statement d is correct.

The UPSC is consulted on the following matters related to personnel management:

• All matters relating to methods of recruitment to civil service and for civil posts.
• The principles to be followed in making appointments to civil services and posts and in making promotions and transfers from one service to another.