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': 'Which hepatitis virus is notorious for causing chronic hepatitis evolving to cirrhosis - \nSelect and explain. \nA. HCV, B. HBV, C. HEV, D. HAV', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., HCV", 'role': 'assistant'}]