Select the option that is related to the third letter-cluster in the…

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

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THE LOGIC FOLLOWED HERE IS :

STEP 1   LETTERS ARRANGED IN ALPHABETICAL ORDER

STEP 2   REVERSE THE PATTERN

AS

STEP 1   BLISS = BILSS

STEP 2   BILSS = SSLIB

S → (+0) → G

S → (+1) → T

L → (+2) → N

I → (+3) → L

B → (+4) → F

SIMILARLY

STEP 1   STOP = OPST

STEP 2   OPST = TSPO

T → (+0) → T

S → (+1) → T

P → (+2) → R

O → (+3) → R+