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': 'Drugs which produce gynaecomastia are all EXCEPT : \nSelect and explain. \nA. Cimetidine, B. Digoxin, C. Cortisol, D. Spironolactone', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]