Complete the series: F, H, J, L, ?

A. N

What is the missing number in the series: 2, 4, 8, 16, ?, 64

B. 32

What is the next letter in the series: A, E, I, M, ?

A. O

Z, X, V, T, ?

A. R

B, D, F, H, ?

D. I