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': 'Each of the following viruses possesses an outer \nlipoprotein envelope except \nSelect and explain. \nA. Varicella Zoster Virus, B. Papilloma Virus, C. Influenza Virus, D. Human immunodeficiency virus', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]