This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Renal physiology, Subject name: Physiology
[{'content': 'Renal blood flow contributes to what % of the cardiac output? \nSelect and explain. \nA. 15%, B. 25%, C. 45%, D. 50%', 'role': 'user'}, {'content': 'Answer: B \nExplanation: In a resting adult, the kidneys receive 1.2 to 1.3 L of blood per minute or just under 25% of the cardiac outputRef: Ganong&;s Review of Medical Physiology, 23rd edition, page no: 643', 'role': 'assistant'}]