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': "A 46–years–old male patient has Cushing's syndrome that is due to the presence of adrenal tumor. Which of the following drugs would be expected to reduce the signs and symptoms of the man's disease ? \nSelect and explain. \nA. Betamethasone, B. Cortisol, C. Fludrocortisone, D. Ketoconazole", 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]