This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Antimetabolites and Quinolones, Subject name: Pharmacology
[{'content': 'All of the following drugs can cause gynaecomastia except \nSelect and explain. \nA. Cimetidine, B. Spironolactone, C. Digoxin, D. Sulfonamides', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Drugs causing gynacomastia S- Spironolactone I- Isoniazid D- Digoxin C- Cimetidine (and Ketoconazole) O- Oestrogens', 'role': 'assistant'}]