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

A. Q

Find the incorrect letter in the series: A, D, G, J, M, P, S, V

D. V

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

A. R

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

B. H

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

A. J