Correct option is A
Given: GASM, CCOO, YEKQ, ? , QICU

Logic: First and third letters are decreasing by 4 places and second and fourth letters decreasing by 2 places
First Letters
G - 4 → C, C -4 → Y, Y - 4 → U, U - 4 → Q
Second Letters
A + 2 → C, C + 2 → E, E + 2 → G, G + 2 → I
Third Letters
S - 4 → O, O - 4 → K, K - 4 → G, G - 4 → C
Fourth Letters
M + 2 → O, O + 2 → Q, Q + 2 → S, S + 2 → U
So, ?→ UGGS
Thus, correct option is