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': 'Infantile myocarditis and pericarditis is due to – \nSelect and explain. \nA. Coxsackie A, B. Coxsackie B, C. Mumps, D. Pox virus', 'role': 'user'}, {'content': 'Answer: B \nExplanation: The commonest cause of myocarditis is coxsackie B infection, which occurs any where from the age of a few hours to 7 weeks, with a peak around two weeks.', 'role': 'assistant'}]