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
[{'content': 'All of the following are renal vasoconstriction except \nSelect and explain. \nA. Angiotensin II, B. Carbon monoxide, C. Norepinephrine, D. Endothelin', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Carbon monoxide is not a vasoconstrictor.Ref: Ganong&;s review of medical physiology; 24th edition; page no; 675', 'role': 'assistant'}]