AFKPU, BGLQV, CHMRW, ??

Series : AFKPU, BGLQV, CHMRW, ??

The pattern followed in each letter of the terms is :

1st letter : A (+1 letter) = B (+1 letter) = C (+1 letter) = D

2nd letter : F (+1 letter) = G (+1 letter) = H (+1 letter) = I

3rd letter : K (+1 letter) = L (+1 letter) = M (+1 letter) = N

4th letter : P (+1 letter) = Q (+1 letter) = R (+1 letter) = S

5th letter : U (+1 letter) = V (+1 letter) = W (+1 letter) = X

Thus, missing term = DINSX

=> Ans - (A)