This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Hepatitis, Subject name: Medicine
[{'content': 'Incubation period of hepatitis B is: \nSelect and explain. \nA. 6 weeks to 6 months, B. 6 days to 6 weeks, C. 6 months to 6 years, D. More than 6 years', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Incubation period of hepatotrophic viruses Virus Incubation period Hepatitis A 15-45 days Hepatitis B 30-180 days with average of 75 days Hepatitis C 15-160 days Hepatitis D 30-180 days Hepatitis E 14-60 days', 'role': 'assistant'}]