This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Excretory System (Kidney, Bladder) Acid-Base Balance, Subject name: Physiology
If the renal plasma flow (RPF) is 600 mL/min, and the hematocrit (hct) is 45%, what is the renal blood flow? 
Select and explain. 
A. 1000 mL, B. 1090 mL, C. 1200 mL, D. 1250 mL
B: 1090 mL
Answer: B: 1090 mL 
Explanation: (RBF) = RPF X (Putting the values into the equation) RBF = 1090 mL.