This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, Subject name: Pharmacology
[{'content': "'A 46 years-old male patient has Cushing's syndrome due to the adrenal tumor. Which of the following drugs would be expected to reduce the symptoms in this case? \nSelect and explain. \nA. Betamethasone, B. Coisol, C. Fludrocoisone, D. Ketoconazole", 'role': 'user'}, {'content': "Answer: D \nExplanation: High dose Ketoconazole has been used in Cushing's syndrome to decrease coicosteroid production ketoconazole- steroid synthesis inhibitor (Ref. Essentials of medical pharmacology TD Tripathi 7th edition page no.793.)", 'role': 'assistant'}]