7 boys P, Q, R, S, T, U and W are sitting in a row facing north (not necessarily in the same order). No one is to the right of Q. R is fourth to the left of Q. W is second to the left of R. T is fourth to the right of U. P is not second to the right of U. How many boys are sitting to the right of R?
Show answer & explanation
Correct answer: D
Explanation

There are 4 boys sitting to the right of R.