Complete the series: E, H, K, N, ?

A. Q

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

A. Q

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

A. J

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

D. K

Find the odd one out in the series: A, D, G, J, M, P, ?

B. R