W21C, U17E, S13G, ?
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → Q9I
Each term has three parts, and each part follows its own rule:
First letter: W, U, S — two steps back each time (W − 2 = U, U − 2 = S), so next is Q
Number: 21, 17, 13 — 4 less each time, so next is 9
Last letter: C, E, G — two steps forward each time, so next is I
The next term is Q9I.