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

A. J

What letter comes next in the series: z, x, v, t, ?

A. S

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

A. J

What letter comes next in the series: z, x, v, t, ?

A. S

Complete the series: b, d, f, h, ?

D. I