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': 'Chronic liver disease is caused by: \nSelect and explain. \nA. Hepatitis A, B. Hepatitis C, C. Hepatitis E, D. All of the above', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Role of hepatitis C and B is implicated in chronic infection.', 'role': 'assistant'}]