This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General Considerations - Infectious Diseases, Subject name: Pediatrics
[{'content': 'Most common viral cause of acquired aqueductal stenosis is: \nSelect and explain. \nA. Rubella, B. Mumps, C. Toxoplasma, D. Enterovirus', 'role': 'user'}, {'content': "Answer: B \nExplanation: b. Mumps(Ref: Nelsons' 20/e p 1552-1553, Ghai 8/e p 217-218)CNS complications of Mumps include Meningoencephalitis, transverse myelitis, aqueductal stenosis & facial palsy.", 'role': 'assistant'}]