Select the letter-cluster that can replace the question mark (?) in the following series.
TULG, WRPC, ZOTY, CLXU,?
Answer & explanation
Correct answer: option 2

Explanation:
TULG, WRPC, ZOTY, CLXU,?
The logic followed here is :
T → (+3) → W → (+3) → Z → (+3) → C → (+3) → F
U → (-3) → R → (-3) → O → (-3) → L → (-3) → I
L → (+4) → P → (+4) → T → (+4) → X → (+4) → B
G → (-4) → C → (-4) → Y→ (-4) → U → (-4) → Q
So, the letter-cluster that replaces the (?) to complete the series is "FIBQ"