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: Physiology
[{'content': 'What percent of cardiac output goes to the kidneys? \nSelect and explain. \nA. 6%, B. 10%, C. 14%, D. 22%', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Blood flow to the kidneys accounts for 22% of cardiac output. In general, the kidneys filter 160 liters of blood per day. Ref: Essentials of Pathophysiology By Carol M. Poh Page 642.', 'role': 'assistant'}]