Select the letter-cluster from among the given options that can replace the question mark (?) in the following series.
CUPBOARD, DVPBOARD, DVQCOARD, ?, DVQCPBSE
Answer & explanation
Correct answer: option 1

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"