Complete the series: B, D, F, H, ?

A. J

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

A. R

What is the next letter in the series: A, C, E, G, ?

B. H

What letter comes next in the series: M, O, Q, S, ?

B. T

Z, Y, X, W, ?

A. V