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
[{'content': 'Aldosterone is known to cause sodium retention. Its Na+ retaining action is exerted on which part of the nephron ? \nSelect and explain. \nA. Proximal convoluted tubule, B. Ascending limb of loop of Henle, C. Collecting ducts, D. Early distal convoluted tubule', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]