In the sequence A, B, C, ?, E, F, what character should replace the question mark?

A. D

What character should replace the question mark in the pattern X, Y, Z, ?, B, C?

A. A

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

A. C

Identify the missing character in the series 1, 4, 9, ?, 25, 36.

A. 16

  - In the following sequence of letters, identify the missing character: A, C, E, G, ?, K.

C. H