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: Anatomy
[{'content': 'Most common site of pheochromocytoma after adrenal gland is \nSelect and explain. \nA. Hilum of kidney, B. Organs of Zuckerkandl, C. Neck, D. Urinary bladder', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Refer Robbins page no 1134 hormone-secreting tumour that can occur in the adrenal glands. Phaeochromocytomas usually develop in the small glands on top of the kidneys (adrenal glands). They most commonly affect people between the ages of 20 and 50, but can occur at any age.', 'role': 'assistant'}]