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

A. I

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

D. I

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

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

C. I