Which of the following letter-clusters will replace the question mark (?) in the given series to make it logically complete?
AZP 13, DXR 17, GVT 21, JTV 25, ?

Given: AZP 13, DXR 17, GVT 21, JTV 25, ?

Logic: In this alpha-numeric series : 1st letter +3, 2nd letter - 2, 3rd letter + 2, Number + 4

A + 3 → D, D + 3 → G, G + 3 → J, J + 3 → M

Z - 2 → X, X - 2 → V, V - 2 → T, T - 2 → R

P + 2 → R, R + 2 → T, T + 2 → V, V + 2 → X

13 + 4 → 17, 17 + 4 → 21, 21 + 4 → 25, 25 + 4 → 29

MRX 29 will next term in the series.

Thus, correct option is (b).