If the pattern is X, Y, Z, A, B, what comes next?

A. C

What is the next term in the series: 5, 10, 20, 40?

C. 80

In the sequence A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U, V, W, X, Y, Z, how many times does the letter 'A' appear?

A. 1

If the sequence is A, C, E, G, what is the next letter?

B. H