In a series of letters: M, O, Q, S, ?, Y. What is the missing letter?

A. T

In the sequence A, C, E, G, ?, K, M, O, what is the missing character?

B. H

Identify the missing character in the series: 2, 4, 6, ?, 10, 12.

B. 8

What character should replace the question mark in the series: B, D, F, ?, J, L?

B. G

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

A. E