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 diagnosis of chronic hepatitis is made if liver disease is present for a minimum of: \nSelect and explain. \nA. 3 weeks, B. 6 weeks, C. 6 months, D. 3 months', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]