Select an option that has the pair of letter clusters with same relation between the letter clusters as is seen in the following pair:

AFKP : ZUPK

Given: AFKP : ZUPK

Logic: Each letter is replaced by its opposite letter in English alphabet.

A ↔ Z: opposite.
F ↔ U: opposite.
K ↔ P: opposite.
P ↔ K: opposite.
AFKP : ZUPK fully follows the opposite-letter pattern.

Let's analyze the options:

Option (a) (CHMR : WRMH)
C ↔ W: (not opposite)
H ↔ R: (not opposite)
M ↔ M: same (not opposite).
R ↔ H: (not opposite)

Doesn’t match the Pattern.
Option (b) (BGLQ : YTOJ)
B ↔ Y: opposite.
G ↔ T: opposite.
L ↔ O: opposite.
Q ↔ J: opposite.
Matches the pattern.
Option (c) (EJOT : VWXY)
E ↔ V: opposite.
J ↔ W: not opposite.
O ↔ X: not opposite.
T ↔ Y: not opposite.
​Doesn’t match the Pattern.​
Option (d) (DINS : XSNI)
D ↔ X: Not opposite.
I ↔ S: Not opposite.
N ↔ N: same (not opposite).
S ↔ I: Not opposite.
​Doesn’t match the Pattern.​
Thus, the correct option is (b) BGLQ : YTOJ​​​​