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
Which of the following is primarily a venodilator ? 
Select and explain. 
A. Hydralazine, B. Minoxidil, C. Nitroprusside, D. Nifedipine
C: Nitroprusside
Answer: C: Nitroprusside 
Explanation: Ans. is 'c' i.e., Nitroprusside o Hydralazine, minoxidil and nifedipine are primarily aeriolar dilators whereas nitroprusside is a mixed aeriolar and venous dilator, therefore best answer here seems to be nitroprusside.