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
All are predominant arteriolar dilators, EXCEPT 
Select and explain. 
A. Diazoxide, B. Minoxidil, C. Hydralazine, D. Na nitroprusside
D: Na nitroprusside
Answer: D: Na nitroprusside 
Explanation: Ans. is 'd' i.e., Na Nitroprusside