Select the option that is related to the third term in the same way as the second term is related to the first term.

PTR : R38 :: IMK : ?

K24

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

******************************************

THE LOGIC FOLLOWED HERE IS :

P + 2 = R

T (20) + R (18)  = 20 + 18 = 38

SIMILARLY

I + 2 = K

M (13) + K (11)  = 13 + 11 = 24

THEREFORE K24 IS CORRECT ANSWER