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

A. I

What is the next letter in the series: B, E, I, M, ?

A. O

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

B. H

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

A. I

Find the missing letter in the series: b, d, f, h, ?

A. J