Which of the following letter-number clusters will replace the question mark (?) in the given series to make it logically complete?

QTW 13, MPS 19, ILO 25, EHK 31, ADG 37, ?

Correct option is D

Given:

QTW 13, MPS 19, ILO 25, EHK 31, ADG 37, ?

Logic:

Each Letter - 4,  Number +6

Solution:

First Letter: Q-4 = M, M-4 = I, I-4 = E, E-4 = A, A-4 = W
Second Letter: T-4 = P, P-4 = L, L-4 = H, H-4 = D, D-4 = Z
Third Letter: W-4 = S, S-4 = O, O-4 = K, K-4 = G, G-4= C
and the number is: 13+6 = 19, 19+6 = 25, 25+6 = 31, 31+6 = 37, 37+6 = 43
QTW 13, MPS 19, ILO 25, EHK 31, ADG 37, WZC43
Thus, the correct option is (d).