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': '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: Out of the given options, only mumps and toxoplasma cause aqueductal stenosis. Toxoplasma is not a virus. Hence, the answer is mumps.', 'role': 'assistant'}]