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: Pharmacology
Both aeriolar and venodilator drug is: September 2007 
Select and explain. 
A. Hydralazine, B. Sodium nitroprusside, C. Minoxidil, D. Captopril
B: Sodium nitroprusside
Answer: B: Sodium nitroprusside 
Explanation: Ans. B: Sodium Nitroprusside