This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Virology, Subject name: Microbiology
[{'content': 'With reference to mumps which of the following is true? \nSelect and explain. \nA. Meningoencephalitis can precede parotitis, B. Salivary gland involvement is limited to the parotid, C. The patient is not infectious prior to clinical parotid enlargement, D. Mumps orchitis frequently leads to infertility', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. is \'a\' i.e., Meningoencephalitis can precede parotitis (Ref: Harrison, 19th/e, p. 1298)"Aseptic meningitis may develop before, during, after, or in the absence of parotitis."ABOUT OTHER OPTIONS:* Mainly parotid glands are involved, but sublingual and submaxillary glands may also be involved.* Patient is infectious 4 - 6 days before the onset of swelling.* Sterility after mumps orchitis is rare. Q', 'role': 'assistant'}]