This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Hepatitis, Subject name: Pathology
[{'content': 'Commonest risk factor for HCV infection is: \nSelect and explain. \nA. i.v. drug abuse, B. Multiple sex paners, C. Surgery within last 6 months, D. Multiple contacts with HCV infected person', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Most common risk factors for HCV infection are: Intravenous drug abuse (54%) Multiple sex paners (36%) Having had surgery within the last 6 month (16%) Needle stick injury (10%) Multiple contacts with an HCV-infected person (10%) Employment in medical or dental fields (1.5%)', 'role': 'assistant'}]