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
How much of blood flows through the kidneys? 
Select and explain. 
A. 1-1.5 L/min, B. 1.5-2 L/min, C. 2-2.5L/min, D. 2.5-3 L/min
A: 1-1.5 L/min
Answer: A: 1-1.5 L/min 
Explanation: 1-1.5 L/min.The total renal blood flow (RBF) is approximately 1.1-1.3 Lit/min.i.e.,22-25% of cardiac output.