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: Pediatrics
[{'content': 'Which of the following statement is true about mumps? \nSelect and explain. \nA. Salivary glands involvement is limited to parotid, B. The patient is not infectious prior to clinical parotid enlargement, C. Mumps orchitis frequently leads to infertility, D. Meningoencephalitis can precede parotitis', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Mumps may involve parotid, submandibular salivary gland.\nPatient is infectious 7 days before to 7 days after onset of parotid swelling.\nMumps orchitis can lead to atrophy of testis, but does not frequently cause infertility.\nMeningoencephalitis may occur before, along with or following the parotitis.', 'role': 'assistant'}]