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: Medicine
[{'content': 'Veical transmission of hepatitis C is: \nSelect and explain. \nA. 5%, B. 10%, C. 25%, D. 50%', 'role': 'user'}, {'content': 'Answer: A \nExplanation: The chances of sexual and perinatal transmission have been estimated to be <5%, well below comparable rates for HIV and HBV infections. HCV potentially can be transmitted sexually and perinatally; however, both of these modes of transmission are inefficient for hepatitis C.', 'role': 'assistant'}]