This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cardiovascular system, Subject name: Pharmacology
Which of the following is Venodilator 
Select and explain. 
A. Hydralizine, B. Minoxidil, C. Nitroprusside, D. Nifedipine
C: Nitroprusside
Answer: C: Nitroprusside 
Explanation: Hydralizine, minoxidil and nifedipine are primarily aeriolar dilator whereas nitroprusside is a mixed aerial and venous dilator. Therefore best answer seems to be is a nitroprusside Refer kDT 6/e p540