In a pattern of letters: X, Y, Z, A, B, ?, D. What is the missing letter?

A. C

In a sequence of letters: A, C, E, G, ?, K. What is the missing letter?

B. H

What character should replace the question mark in the sequence: A, B, C, ?, E?

A. D

In a sequence of letters: A, C, E, G, ?, K. What is the missing letter?

B. H

Identify the missing letter in the pattern: X, Y, ?, A, B.

A. Z