Find the odd one out in the series: A, C, E, G, I, K, M, O, Q, S, U, W, ?

B. V

A, E, I, O, ?

A. U

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

B. H

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

A. J

Find the missing letter in the series: B, D, F, H, ?

A. J