Find the missing letter in the sequence M, N, O, ?, Q, R.

A. P

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

A. C

If the pattern is A1, B2, C3, ?, E5, what should replace the question mark?

A. D4

What character is missing in the series M, N, O, ?, Q, R?

A. P

Find the missing character in the series A1, B2, C3, ?, E5.

A. D4