1. 

What should come next in the following letter series?

P Q P Q R P Q R S P Q R S T P Q R S T U P
Q R S T U V P Q R S T

A. S
B. U
C. Q
D. R
E. None of these

Answer: Option B

Explanation:

Pattern of the series as shown below

PQ/PQR/PQRS/PQRST/PQRSTU/PQRSTUV/PQRSTU

Hence, the missing term is U.