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

B. H

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

C. Q

Complete the series: x, v, t, r, ?

A. P

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

A. R

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

A. S