Correct option is A
Given:
AZY, BXW, CVU, DTS, ?, FPO
Logic:The first letters increase by +1 in alphabetical order.
The second letters decrease by −2 in alphabetical order.
The third letters also decrease by −2 in alphabetical order.

First letters:
A + 1 = B
B + 1 = C
C + 1 = D
D + 1 = E
E + 1 = F
Second letters:
Z − 2 = X
X − 2 = V
V − 2 = T
T − 2 = R
R − 2 = P
Third letters:
Y − 2 = W
W − 2 = U
U − 2 = S
S − 2 = Q
Q − 2 = O
So, the missing term is ERQ.
Thus, the correct option is (A).