Which letter cluster will replace the question mark (?) to complete the given series?
ABCD, EBCD, ?, OBCD, UBCD
Answer & explanation
Correct answer: option 3
Explanation:
ABCD, EBCD, ?, OBCD, UBCD
The logic followed here is :
A → (+4) → E → (+4) → I → (+6) → O → (+6) → U
B → (0) → B → (0) → B → (0) → B → (0) → B
C → (0) → C → (0) → C → (0) → C → (0) → C
D → (0) → D → (0) → D → (0) → D → (0) → D
So, the letter-cluster that replaces the (?) to complete the series is "IBCD"