In the following question, a group of letters is given. The letters of each group are related with the letters of the same group by some Logic / Rule / Relation. From the given alternatives, select a group of letters which follows the same
Logic / Rule / Relation.
(RST, MML, HGD)
1
(PUT, KOL, FHD)
2
(PQN, KKF, FEY)
3
(MNK, GFC, BZU)
4
(TUN, OOF, JIX)