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.
PRO: LJM
ZEN : BWN

PRO: LJM
ZEN : BWN

Logic: Opposite letter +1

PRO:  P (opposite letter K):  K+1=L, R (opposite letter I): I+1=J, O (opposite letter): L+1=M

ZEN: Z (opposite letter A): A+1=B, E (opposite letter V): V+1=W, N (opposite letter): M+1=N

Similarly,

Option A)KLP : QPL;: K (opposite letter P): P+1=Q, L (opposite letter O): O+1=P, P (opposite letter K): K+1=L, (Follows)

Option B) DEN : WWN: D (opposite letter W): W+1=X, E (opposite letter V): V+1=W, N (opposite letter M): M+1=N, (Does not follow) 

Option C)NYZ : MCB: N (opposite letter M): M+1=N, Y (opposite letter B): B+1=C, Z (opposite letter A): A+1=B(Does not follow)

Option D) GUN : UGM: G (opposite letter T): T+1=U, U (opposite letter F): F+1=G, N (opposite letter M): M+1=N(Does not follow)

Thus, Option A is the correct answer.

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