This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pathology
Oophoritis, Orchitis, Chipmunk cheeks seen in: 
Select and explain. 
A. Mumps., B. Sialadenitis., C. Mucocele., D. Sialadenosis.
A: Mumps.
Answer: A: Mumps. 
Explanation: None