This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiratory system, Subject name: Physiology
The vasodilatation produced by carbon dioxide is maximum in one of the following 
Select and explain. 
A. Kidney, B. Brain, C. Liver, D. Hea
B: Brain
Answer: B: Brain 
Explanation: The vasodilation produced by carbon dioxide is maximum in the brain Ref: guyton and hall textbook of medical physiology 12 edition page number:360,361,362