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: Radiology
[{'content': 'The diagnostic procedure not done in case of pheochromocytoma – \nSelect and explain. \nA. CT scan, B. MRI, C. FNAC, D. MIBG scan', 'role': 'user'}, {'content': 'Answer: C \nExplanation: "Percutaneous fine-needle aspiration of chromaffin tumors is contraindicated; indeed, pheochromocytoma should\xa0be considered before adrenal lesions are aspirated."\xa0\n"Catastrophic hypertensive crisis and fatal cardiac arrhythmias can occur spontaneously or may be triggered by\xa0intravenous contrast dye or glucagon injection, needle biopsy of the mass, anesthesia, and surgical procedures."', 'role': 'assistant'}]