Select the option in which the pair of letter-clusters share the same relationship as that shared by the given letter-clusters.

RS : IH

TM : GN

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 :

THE LETTER FORM IS THE OPPOSITE LETTER OF THE GIVEN CLUSTER

R → (OPPOSITE) → I

S → (OPPOSITE) → H

SIMILARLY

TM : GN

T → (OPPOSITE) → M

G → (OPPOSITE) → N