Complete the series: a, c, e, g, ?

B. H

Complete the series: m, n, o, p, ?

A. Q

What is the missing number in the series: 2, 4, 8, 16, ?, 64?

B. 32

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

B. J

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

C. I