Six friends Y, R, A, S, P, and B are sitting around a circular table facing the centre. Y is the only person who sits between R and S, when counted from the left of R. B sits to the immediate right of A. S sits to the immediate right of B. Who sits between P and B when counted from the right of P?

Given: 

Six friends Y, R, A, S, P, and B are sitting around a circular table facing the centre.

Y is the only person who sits between R and S, when counted from the left of R.

B sits to the immediate right of A.

S sits to the immediate right of B.

A sits between P and B when counted from the right of P.

Thus, correct option is (a).