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': 'Which of the following markers in the blood is the most reliable indicator of recent hepatitis B infection? \nSelect and explain. \nA. HBsAg, B. IgG anti - HBs, C. IgM anti HBc, D. IgM anti - HBe', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]