Complete the series: A, C, E, G, ?

A. I

Which letter should replace the question mark in the series: B, D, F, H, ?

D. I

What is the next letter in the series: B, E, I, M, ?

A. O

B, D, F, H, ?

A. J

Identify the missing letter in the series: Z, X, V, T, ?

D. U