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
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: B i.e. BrainThe metabolic changes that produce vasodilatation, in most tissue, is decrease in O2 & pHT CO2 is associated with cutaneous & cerebral vosodilatationQ, but vasoconstriction elsewhere & usually a slow rise in BP.