Select the option that will fill in the blank and complete the given series.

CDZ, DGE, EJJ, FMO, GPT, _____

HSY

Explanation:

CDZ, DGE, EJJ, FMO, GPT, _____

The logic followed here is :

C → (+1) → D → (+1) → E → (+1) → F → (+1) → G → (+1) → H

D → (+3) → G → (+3) → J → (+3) → M → (+3) → P → (+3) → S

Z → (+5) → E → (+5) → J → (+5) → O → (+5) → T → (+5) → Y

So, the letter-cluster that replaces the (?) to complete the series is "HSY"