1. 

What should come next in the following letter series?

A B C D P Q R S A B C D E P Q R S T A B C D E F P Q R S T

A. A
B. V
C. U
D. W
E. None of these

Answer: Option C

Explanation:

Pattern of the series as shown below

ABCD/PQRS/ABCDE/PQRST/ABCDEF/PQRSTU

Hence, the missing term is U.