This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Virology, Subject name: Microbiology
[{'content': 'Chronic liver disease is caused by - \nSelect and explain. \nA. Hepatitis B, B. Hepatitis A, C. Hepatitis C, D. Hepatitis E', 'role': 'user'}, {'content': 'Answer: A \nExplanation: HBV causes chronic liver disease or cirrhosis REF:MICROBIOLOGY ANANTHA NARAYANAN NINTH EDITION PAGE.542', 'role': 'assistant'}]