Find the missing letter in the series: z, x, v, t, ?

A. R

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

A. J

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

B. H

Identify the missing letter in the series: Z, Y, X, W, ?

A. V

What is the next letter in the series: M, N, O, P, ?

A. Q