Find the incorrect letter in the series: A, D, G, J, M, P, S

D. P

What is the next letter in the series: M, N, O, P, ?

A. Q

What is the next letter in the series: A, C, E, G, ?

B. H

What is the next letter in the series: A, C, E, G, ?

B. H

What is the next letter in the series: M, O, Q, S, ?

B. T