Select the letter-pair that can replace the question mark (?) in the following series.
AR, CU, EX, GA, ?
Answer & explanation
Correct answer: option 2
Explanation:
AR, CU, EX, GA, ?
The logic followed here is :
A → (+2) → C → (+2) → E → (+2) → G → (+2) → I
R → (+3) → U → (+3) → X → (+3) → A → (+3) → D
So, the letter-cluster that replaces the (?) to complete the series is "ID"