Among P, Q, R, S, T and U, P is taller than R and S, but not shorter than T and U, and Q is taller than R, S, T, and U but not as tall as P. Who amongst them is the tallest?
1) Data inadequate
2) T
3) Q
4) P
5) None of these

Explanation

4, Either (B) alone or (D) alone