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: Medicine
[{'content': "Intake of exogenous steroid causes. \nSelect and explain. \nA. Addison's disease, B. Cushing's syndrome, C. Pheochromocytoma, D. Conn's syndrome", 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans is option 2. Cushing&;s syndrome The most common cause of Cushing&;s syndrome is iatrogenic administration of steroids for a variety of reasons. Ref Harrison 17/e p. 2254-2255', 'role': 'assistant'}]