Select the term that will come next in the following series.
GN, MT, SZ, ____
Answer & explanation
Correct answer: option 1

Explanation:
GN, MT, SZ, ____
The logic followed here is :
G → (+6) → M → (+6) → S → (+6) → Y
N → (+6) → T → (+6) → Z → (+6) → F
So, the letter-cluster that replaces the (?) to complete the series is "YF"