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: Microbiology
[{'content': 'A rise in the anti-HBc immunoglobulin in a patient\nindicates \nSelect and explain. \nA. Acute infection, B. carrier state, C. prodromal phase, D. convalescence', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]