This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anti-Hypertensive, Subject name: Pharmacology
[{'content': 'All are predominant arteriolar dilators, EXCEPT \nSelect and explain. \nA. Diazoxide, B. Minoxidil, C. Hydralazine, D. Na nitroprusside', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., Na Nitroprusside", 'role': 'assistant'}]