Select the option that is related to the fifth letter-cluster in the same way as the second letter-cluster is related to the first lettercluster and the fourth letter-cluster is related to the third letter-cluster.
PLAN : QOMKBZOM :: SINK : TRJHOMLJ :: RUDE: ?
Answer & explanation
Correct answer: option 1
1 2 3 4 5 6 7 8 9 10 11 12 13
A B C D E F G H I J K L M
↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓
Z Y X W V U T S R Q P O N
26 25 24 23 22 21 20 19 18 17 16 15 14
PLAN : QOMKBZOM :: SINK : TRJHOMLJ :: RUDE: ?
The logic;
(each letter is increased and decreased by 1 positional value)

Thus, SQVTECFD is correct.