Concept:The series follows the sequential order of the English alphabet.
Explanation:The letters given are M, N, O, and P.
They are consecutive letters in the alphabet.
M is the 13th letter, N is 14th, O is 15th, P is 16th.
The next letter after P is Q, which is the 17th letter.
Thus, the next term in the series is Q.
Answer:D. Q