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
Aerial dilator used in treatment of congestive hea failure are All except 
Select and explain. 
A. Hydralizine, B. Nifedipine, C. Prazosin, D. Nitrates
D: Nitrates
Answer: D: Nitrates 
Explanation: Refer kDT 6/e p540 Nitrates are primaryly venodilators. Hydralizine and nifedipine dilate mainly aerials whereas ACE inhibitors an alpha blockers dilate both aerioles as well as veins