This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pharmacology
Aldosterone action is on : 
Select and explain. 
A. Proximal tubule, B. Distal tubules, C. Loop of Henle, D. Collecting duct
D: Collecting duct
Answer: D: Collecting duct 
Explanation: None