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

A. AD : GH
B. AB : PQ
C. QR : ST
D. RS : TV

Answer: Option C

Explanation:

The letters in both the groups in a pair are consecutive letters in order. The second letter of the first group and the first letter of the second group are also consecutive letters in order.