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': 'Incubation period of herpes zoster is \nSelect and explain. \nA. 7-14 days, B. 1 month, C. 1-2 years, D. 3-6 months', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]