Solution:The pattern followed here is :ZWSH → (Z - 3 = W), (W - 4 = S), S → H(opposite)
FCYB → (F - 3 = C), (C - 4 = Y), Y → B(opposite)
PMIR → (P - 3 = M), (M - 4 = I), I → R(opposite)
But,
GDAZ → (G - 3 = D), (D - 3 = A), A → Z(opposite)
Hence, GDAZ is the correct answer.