Solutions
Given : Six people P, Q, R, S, T, and U are sitting on a wall facing the South.
Explanation:
1) Only Q is sitting between P and S.
2) Q is to the immediate right of P.
As position of Q is not known yet therefore are four possible positions for Q.


3) Only U is between T and R.
4) U is the immediate left of R.
5) T is sitting to the right of S.
As in case - 1 there is no possible position for T therefore it is eliminated.
As in case - 2 there is no possible position for T and U according to the given condition therefore it is eliminated.
As in case - 3 there is no possible position for T, U and R according to the given condition therefore it is eliminated.

Thus, according to the final arrangement T is sitting to the immediate right of S.
Hence, "T" is the correct answer.