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: Pathology
[{'content': 'Pheochromocytoma does not arise from which of the following - \nSelect and explain. \nA. Adrenal medulla, B. Adrenal cortex, C. Extra adrenal sites, D. Sympathetic chain', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Pheochromocytoma\n\nPheochromocytoma is a neoplasm of chromaffin cells which usually arise from the adrenal medulla.\nAbout 10% of these tumors arise at extra-adrenal sites, where they are called paraganglioma:-\n\n\nParavertebral paraganglia (organs of zuckerkandl ) → Have sympathetic connection.\nCarotid bodies (chemodectomas).', 'role': 'assistant'}]