In a March Past, seven persons are standing in a row. Q is standing left to R but right to P. O is standing right to N and left to P. Similarly, S is standing right to R and left to T. Find out who is standing in the middle.

A. P
B. Q
C. R
D. O
Answer: B . Q

Justification: Q is left to R and to the right of P i.e. P, Q, R. O is to the right of N and left of P i.e. N, O, P. S is to the right of R and left of T i.e. R, S, T. So the order is : N, O, P, Q, R, S, T. Clearly, Q is in the middle.