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 30 days. His liver function tests showed bilirubin of 100mg/dI, SGOT/SGPT-1 100/1450, serum alkaline phosphatase-240 IU. He was positive for Hbs Ag. What should be the confirmatory test to establish Acute hepatitis B infection? \nSelect and explain. \nA. IgM Anti-HBc antibody, B. HbeAg, C. HBV DNA by PCR, D. Anti-HBc antibody', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Answer is A (IgM - Anti - HBc antibody) :', 'role': 'assistant'}]