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

A. J

Find the odd one out in the series: A, C, E, G, I, K, M, O, Q, R

D. R

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

A. Q

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, ?

D. P