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: Medicine
[{'content': 'Group of viruses that inhabit the alimentary tract of children below 2 years age: \nSelect and explain. \nA. Coxsackie virus, B. Paramyxovirus, C. Varicella zoster virus, D. Herpes simplex virus', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]