Identify the missing letter in the series: z, x, v, t, ?

C. Q

What is the next letter in the series: J, L, N, P, ?

A. Q

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

A. J

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

A. I

Identify the missing letter in the series: Z, X, V, T, ?

B. S