Select the pair of letter groups that has the same relationship as PQ : RS.

Explanation

1. 01

   Each letter of PQ moves two places forward: P→R, Q→S.

2. 02

   K→M and L→N, so KL : MN matches.

3. 03

   KL : NO moves three places, KL : LM one place and KL : JK one place back.