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': 'Long–term use of which diuretic agent can result in gynaecomastia ? \nSelect and explain. \nA. Amiloride, B. Spironolactone, C. Triamterene, D. Acetazolamide', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]