Which letter-cluster will replace the question mark (?) in the following series ?
SAG, KSY, CKQ, ?
Answer & explanation
Correct answer: option 4
Explanation:

Explanation:
SAG, KSY, CKQ, ?
The logic followed here is :
S → (-8) → K → (-8) → C → (-8) → U
A → (-8) → S → (-8) → K → (-8) → C
G → (-8) → Y → (-8) → Q → (-8) → I
So, the letter-cluster that replaces the (?) to complete the series is "UCI"