Select the incorrect term in the alpha-numeric series:

X, Z, B, D, F, G​​

Given: X, Z, B, D, F, G

Logic: 1st letter + 2 = 2nd letter is follows.

X + 2 = Z

Z + 2 = B

B + 2 = D

D + 2 = F

F + 2 = H $$\neq$$ G

So, G is wrong term in the series.

Thus, correct option is (d).