This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Parathyroid and adrenal glands, Subject name: Surgery
[{'content': 'True about adrenocoical carcinoma: \nSelect and explain. \nA. Rare tumor, B. More than half are functional, C. Most commonly associated with Cushing syndrome, D. All of the above', 'role': 'user'}, {'content': "Answer: D \nExplanation: ADRENOCOICAL CARCINOMARare tumor>50% are functional.Cushing's syndrome is most commonly seen, followed by virilization.Capsular or vascular invasion is the most reliable sign of cancer.", 'role': 'assistant'}]