This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Steroid, Subject name: Pharmacology
[{'content': 'Corticosteroid with maximum sodium retaining potential? \nSelect and explain. \nA. Dexamethasone, B. Prednisolone, C. Aldosterone, D. Betamethasone', 'role': 'user'}, {'content': 'Answer: C \nExplanation: ANSWER: (C) AldosteroneREF: KDT 6th edition, page 282"Aldosterone is most potent mineralocorticoid and betamethasone is most potent glucocorticoid"', 'role': 'assistant'}]