In the given letter-cluster pairs, the first letter-cluster is related to the second letter-cluster following a certain logic. Study the given pairs carefully, and from the given options, select the pair that follows the same logic.
HCM : MHR
FET : KJY

​letter-cluster pairs

​HCM : MHR
FET : KJY

Logic: The first letter, second letter and third letter are shifted +5 positions​

By option (a). PRT : TPS

P → T: Position changes from 16 → 20 (+4), not +5.

R → P: Position changes from 18 → 16 (-2), not +5.

T → S: Position changes from 20 → 19 (-1), not +5.

This does not follow the +5 logic.

By option (b). UFL : LKU

U → L: Position changes from 21 → 12 (-9), not +5.

F → K: Position changes from 6 → 11 (+5).

L → U: Position changes from 12 → 21 (+9), not +5.

This does not follow the +5 logic.

By option (c). GHK : HKJ

G → H: Position changes from 7 → 8 (+1), not +5.

H → K: Position changes from 8 → 11 (+3), not +5.

K → J: Position changes from 11 → 10 (-1), not +5.

This does not follow the +5 logic.

By option (d). UPJ : ZUO

U → Z: Position changes from 21 → 26 (+5).

P → U: Position changes from 16 → 21 (+5).

J → O: Position changes from 10 → 15 (+5).