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': 'A serum of patient shows HbsAg and IgM to Hbc. He is diagnosed to have: \nSelect and explain. \nA. Chronic hepatitis, B. Acute hepatitis, C. Acute infection of hepatitis C, D. Chronic infection of hepatitis B', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]