This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Chronic Kidney Disease and Uremia, Subject name: Medicine
Drug helpful in Chronic kidney disease? 
Select and explain. 
A. Beta blocker, B. Amlodipine, C. ACE inhibitor, D. Telmisartan
C: ACE inhibitor
Answer: C: ACE inhibitor 
Explanation: Ans. (c) ACE inhibitorRef : Harrison 19th ed. /2478-79* ACE inhibitors may slow the progression of renal disease in CRF.* ACE inhibitor therapy generally lowers systemic blood pressure, does not alter renal function and decreases proteinuria in patients with CRF.* The reduction in proteinuria appears to be variable and may depend on pre-treatment glomerular haemodynamics and/or the activity of the renin- angiotensin-aldosterone system.