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
[{'content': 'Plasma Renin activity is lowered by which of the following group of drugs? \nSelect and explain. \nA. Calcium channel blockers, B. Alpha 2 agonists, C. ACE inhibitors, D. Aeriolar dilators', 'role': 'user'}, {'content': 'Answer: B \nExplanation: 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', 'role': 'assistant'}]