Select the letter-cluster from among the given options that can replace the question mark (?) in the following series.
AAI, AEI, AII, AOI, ?
Answer & explanation
Correct answer: option 1
Explanation:
AAI, AEI, AII, AOI, ?
The logic followed here is :
A → (0) → A → (0) → A → (0) → A → (0) → A
A → (+4) → E → (+4) → I → (+6) → O → (+6) → U
I → (0) → I → (0) → I → (+3) → I → (0) → I
So, the letter-cluster that replaces the (?) to complete the series is "AUI"