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

A. K

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

C. H

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

A. R

What is the next letter in the series: M, N, O, P, ?

A. Q

M, N, O, P, ?

A. Q