This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cardiovascular system, Subject name: Pharmacology
[{'content': 'Anti androgen use in hea failure is \nSelect and explain. \nA. Carvedilol, B. Sampatrilat, C. Spiranolactone, D. Abiraterone', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Spironolactone is a potassium-sparing diuretic (water pill) that prevents your body from absorbing too much salt and keeps your potassium levels from getting too low. Spironolactone is used to treat hea failure, high blood pressure (hypeension), or hypokalemia (low potassium levels in the blood). Refer kDT 7/e p 514', 'role': 'assistant'}]