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: Surgery
[{'content': 'What percentage of the blood flow to the liver is supplied by the hepatic aery - \nSelect and explain. \nA. 90%, B. 20%, C. 40%, D. 60%', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., 20 %", 'role': 'assistant'}]