_ op _ mo _ n _ _ pnmop _.

Question: _ op _ mo _ n _ _ pnmop _.
[A].

mnpmon

[B].

mpnmop

[C].

mnompn

[D].

mnpomn

Answer: Option A

Explanation:

The series is mopn/mopn/mopn/mopn. Thus, the pattern ‘mopn’ is repeated.