This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Kidney, Subject name: Pharmacology
Plasma Renin activity is lowered by which of the following group of drugs? 
Select and explain. 
A. Calcium channel blockers, B. Alpha 2 agonists, C. ACE inhibitors, D. Aeriolar dilators
B: Alpha 2 agonists
Answer: B: Alpha 2 agonists 
Explanation: Plasma renin activity is increased by beta 1 stimulation, ACE inhibitorsDecreased by aliskerin, remikerin, clonidine(central alpha 2 agonists)Ref: KD Tripathi 7th ed, p 500