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.
MGB : NTY
THK : GSP

Pair- MGB : NTY, THK : GSP

Logic: Each given pair using the "opposite value" logic in the alphabet.

MGB : NTY

M N (opposite), G  T (opposite), B Y (opposite)

THK : GSP​

T  G (opposite), H  S (opposite), K  P (opposite)

(a) CHX : XIC

C  X (C and X are opposites), H  I (H and I are not opposites), X  C (X and C are opposites)  (Not follow)

(b) LCP : OXJ

L  O (L and O are opposites), C  X (C and X are opposites), P  J (P and J are not opposites) (Not follow)

(c) QDF : JWU

Q  J (Q and J are opposites), D  W (D and W are opposites), F  U (F and U are opposites) (Follows)

(d) MER : NVH 

M  N (M and N are opposites), E  V (E and V are opposites), R  H (R and H are not opposites) (Not follow)

​QDF : JWU follows the same pattern, as each letter in the second cluster is the opposite of the letter in the first cluster.

Thus, correct answer is (c) QDF : JWU​​