1.  Select the pair in which the letter-groups are similarly related as in the given pair.
OT : PS

A. TV : SW
B. IL : HR
C. PN : NM
D. BE : PC
E. None of these

Answer: Option E

Explanation:

The first letter of the first group is moved one step forward, while the second letter is moved one step backward to obtain the corresponding letter of the second group.