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: Microbiology
[{'content': 'Varicella are classified under : \nSelect and explain. \nA. Enterovirus, B. Retrovirus, C. Poxvirus, D. Herpes virus', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]