This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.V.S, Subject name: Pharmacology
[{'content': 'A hypertensive patient is suffering from bilateral renal artery stenosis. Which of the following drug should not be given? \nSelect and explain. \nA. Enalapril, B. Atenolol, C. Nifedipine, D. Hydrochlorothiazide', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. A. EnalaprilBilateral renal artery stenosis is contraindication for the use of ACE inhibitors. Angiotensin II by constricting the efferent arteriole can maintain the GFR in insufficient state. But by giving Ace inhibitors, they can precipitate renal failure.', 'role': 'assistant'}]