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: Unknown
[{'content': 'Tumor that follows rule of 10 is - \nSelect and explain. \nA. Pheochromocytoma, B. Oncocytoma, C. c) Lymphoma, D. Renal cell carcinoma', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. is \'a\' i.e., Pheochromocytoma Note-o Pheochromocytomas usually subscribe to a convenient "rule of 10s":-10% of pheochromocytomas arise in association with one of several familial syndromes. These include the MEN-2A& MEN-2B syndromes, type I neurofibromatosis, von Hippel-Lindau syndrome & Stuige-Weber syndrome.10% of pheochromocytomas are extra-adrenal, occurring in sites such as organ of Zuckerkandl & carotid body, where these chromaffin-negative tumors are usually called paragangliomas to distinguish them from pheochromocytomas.10% of nonfamilial adrenal pheochromocytomas are bilateral: this figure may rise to 70% in cases that are associated with familial syndromes.10% ofadrenal pheochromocytomas are biologically malignant, although the associated hypertension represents a serious & potentially lethal complication of even "benign1" tumors.10% of adrenal pheochromocytomas arise in childhood, usually the familial subtypes, and with a strong male preponderance. The nonfamilial pheochromocytomas most often occur in adults between 40 & 60 years of age, with a slight female preponderance.', 'role': 'assistant'}]