Which letter should replace the question mark in the series: B, D, F, H, ?

D. I

What letter should come next in the series: B, D, F, H, ?

A. J

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

C. Q

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

B. H

Find the odd one out in the series: A, C, E, G, H, I, K.

C. H