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': "Cause of Reye's syndrome in children: March 2013 \nSelect and explain. \nA. Polio virus, B. Measles virus, C. Influenza virus, D. HIV", 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. C i.e. Influenza virus', 'role': 'assistant'}]