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 thiy-year man presented with nausea, fever and jaundice of 5 days duration. The biochemical tests revealed a bilirubin of 6.7 mg/d1 (conjugated 5.0 mg/dl) with SGOT/ SGPT (AST/ALT) of 1230/900 IU/mi. The serological tests showed presence of HBs Ag. IgM anti-HBc and Hbe Ag. The most likely diagnosis is: \nSelect and explain. \nA. Chronic hepatitis B infection with high infectivity., B. Acute hepatitis B infection with high infectivity, C. Chronic hepatitis infection with low infectivity., D. Acute hepatitis B infection with low infectivity', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Answer is B (Acute hepatitis B infection with high infectivity): Presence of Anti HB IgM and Hbs Ag indicates acute infection. Presence of Hbe Ag indicates high infectivity', 'role': 'assistant'}]