Select the letter-cluster from among the given options that can replace the question mark (?) in the following series.
YTUQ, XVRU, ?, VZLC, UBIG
Answer & explanation
Correct answer: option 2

Explanation:
YTUQ, XVRU, ?, VZLC, UBIG
The logic followed here is :
Y → (-1) → X → (-1) → W → (-1) → V → (-1) → U
T → (+2) → V → (+2) → X → (+2) → Z → (+2) → B
U → (-3) → R → (-3) → O → (-3) → L → (-3) → I
Q → (+4) → U → (+4) → Y → (+4) → C → (+4) → G
So, the letter-cluster that replaces the (?) to complete the series is "WXOY"