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
Brain blood supply 
Select and explain. 
A. 55 ml/100 gm/min, B. 400 ml/100gm/min, C. 100 ml/100gm/min, D. 200 ml/100gm/min
A: 55 ml/100 gm/min
Answer: A: 55 ml/100 gm/min 
Explanation: -        Brain blood supply - 750ml/min OR 55ml/100gm/min OR 13.9% of cardiac output