Select the letter-cluster from among the given options that can replace the question mark (?) in the following series.

CUPBOARD, DVPBOARD, DVQCOARD, ?, DVQCPBSE

DVQCPBRD

Explanation:

CUPBOARD, DVPBOARD, DVQCOARD, ?, DVQCPBSE

The logic followed here is :

C → (+1) → D → (0) → D → (0) → D → (0) → D 

U → (+1) → V → (0) → V → (0) → V → (0) → V

P → (0) →  P → (+1) →  Q → (0) → Q → (0) → Q 

B → (0) → B → (+1) → C → (0) →  C → (0) → C

O  → (0) → O → (0) →  O  → (+1) → P  → (0) → P  

A → (0) → A → (0) → A → (+1) → B → (0) → B

R → (0) →  R → (0) → R → (0) → R → (+1) → S 

D → (0) →  D → (0) → D → (0) → D → (+1) → E 

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