This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous (Pharmacology), Subject name: Pharmacology
[{'content': 'Which one of the following is an Aldosterone antagonist? \nSelect and explain. \nA. Spironolactone, B. Amiloride, C. Triameterine, D. Acetazolamide', 'role': 'user'}, {'content': 'Answer: A \nExplanation: (A) Spironolactone > Spironolactone is a steroid chemically related to the mineralocorticoid aldosterone> Spironolactone is an aldosterone antagonist.', 'role': 'assistant'}]