This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Renal physiology, Subject name: Physiology
All of the following are renal vasoconstriction except 
Select and explain. 
A. Angiotensin II, B. Carbon monoxide, C. Norepinephrine, D. Endothelin
B: Carbon monoxide
Answer: B: Carbon monoxide 
Explanation: Carbon monoxide is not a vasoconstrictor.Ref: Ganong&;s review of medical physiology; 24th edition; page no; 675