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': 'Potassium-sparing diuretics include: \nSelect and explain. \nA. Amiloride, B. Triamterene, C. Spironolactone, D. Ethacrynic acid', 'role': 'user'}, {'content': 'Answer: C \nExplanation: High efficacy diuretic\xa0- Furosemide, Bumetanide, Torsemide\nMedium efficacy(inhibit Na-Cl symport )\xa0- Thiazides (Hydrochlorothiazide, Benzthiazide, Hydroflumethiazide, Clopamide), Thiazide-like (Indapamide, Xipamide, Metolazone)\nCarbonic anhydrase inhibitors\xa0– Acetazolamide\nInhibitors of renal epithelial sodium channel –\xa0Triamterene, Amiloride\nPotassium-sparing\xa0- Spironolactone(Aldosterone antagonist), Amiloride, Triamterene (inhibit renal epithelial Na channel)\nOsmotic diuretics\xa0- Mannitol, Isosorbide, Glycerol.', 'role': 'assistant'}]