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

C. Q

What is the next letter in the series: Q, S, U, W, ?

A. Y

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

C. Q

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

B. J

What letter comes next in the series: M, O, Q, S, ?

B. T