What letter comes next in the series: M, O, Q, S, ?

A. T

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

A. I

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

D. I

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

A. J

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

A. Q