In the series A, B, C, D, E, F, G, H, I, J, how many letters come before the letter 'E'?

A. 4

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

B. 3

What is the 15th letter of the English alphabet?

A. O

If the letter 'X' is the 24th letter of the alphabet, what is the letter that comes immediately before it?

A. W

In the series A, B, C, D, E, F, G, H, I, J, how many letters are there before the letter 'E'?

B. 4