This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Hematology and CVS, Subject name: Pharmacology
In which of the following patients would enalapril be the best first line agent for high blood pressure control? 
Select and explain. 
A. A 62 year old man with renal aery stenosis, B. A 32 year old pregnant female, C. A 41 year old woman with hyperkalemia, D. A 56 year old diabetic woman
D: A 56 year old diabetic woman
Answer: D: A 56 year old diabetic woman 
Explanation: Enalapril ACE inhibitor. Lowers the risk of Diabetic nephropathy Prodrug which is conveed to Enalaprilat, its active form. This active form is also available as a intravenous formulation. It is given when oral drug is contraindicated. It is also used in hypeensive urgencies ACE inhibitors are contra-indicated in: Bilateral renal aery stenosis Pregnancy Hyperkalemia.