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 30-year-old patient presented with history of jaundice for 10 days. His liver function tests showed bilirubin of 10 mg/dl, SGOT/SGPT 1100/1450, serum alkaline phosphatase 240 IU. He was positive for HbsAg. What should be the confirmatory test to establish acute hepatitis infection? \nSelect and explain. \nA. IgM anti-HBc antibody, B. HbeAg, C. HBV DNA by CPR, D. Anti-HBc antibody', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]