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': 'Different organs receive different amounts of cardiac output. The organ with MAXIMUM blood flow in ml/kg/min is: \nSelect and explain. \nA. Kidney, B. Liver, C. Brain, D. Lung', 'role': 'user'}, {'content': 'Answer: A \nExplanation: The kidneys receive 20-25% of the cardiac output. They receive the highest blood flow per gram of organ weight in the body i.e, 400 mL/min/ 100 gm. This is several times greater per unit weight of organ than the blood flow through most other organs. Ref: Radiological Imaging of the Kidney edited by Emilio Quaia, 2011, Page 24.', 'role': 'assistant'}]