This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Epidemiology, Subject name: Social & Preventive Medicine
[{'content': 'Isolation period of Hepatitis A- \nSelect and explain. \nA. 1 week, B. 2 week, C. 3 week, D. 4 week', 'role': 'user'}, {'content': 'Answer: C \nExplanation: .', 'role': 'assistant'}]