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
[{'content': 'Both aeriolar and venodilator drug is: September 2007 \nSelect and explain. \nA. Hydralazine, B. Sodium nitroprusside, C. Minoxidil, D. Captopril', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. B: Sodium Nitroprusside', 'role': 'assistant'}]