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: Surgery
What percentage of the blood flow to the liver is supplied by the hepatic artery - 
Select and explain. 
A. 90%, B. 20%, C. 40%, D. 60%
B: 20%
Answer: B: 20% 
Explanation: • Weight: 1800 gm in men and 1400 gm in women
• Total blood flow: 1.5 L/min
• Free pressure in a hepatic vein: 1-2 mm Hg
• Liver can store up to maximum of 65 gm of glycogen/kg of liver tissue.
• Account for 4% of body weight, consumes about 28% of total body blood flow and 20% of the total oxygen consumed by the body.
• Expends 20% of the total kilocalories used by the whole body.