Complete the series: B, D, F, H, ?

A. J

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

A. I

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, ?

A. S

Find the odd one out in the series: A, D, G, J, K

D. K