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

A. I

In the sequence: Z, Y, X, W, ?, what comes next?

A. V

How many times does the letter 'A' appear in the series: A, B, A, C, A, D, E?

B. 3

Identify the next letter in the sequence: Z, X, V, T.

C. U

Which word comes first in alphabetical order? Dog, Cat, Elephant, Bear.

D. BEAR