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: Surgery
[{'content': 'Insulinoma true area) Present in pancreasb) Mostly malignantc) surgical therapy indicated if diagnosedd) Present in Bile \nSelect and explain. \nA. a, B. bc, C. ac, D. b', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Only about 10-15% of insulinomas are malignant (whereas all other endocrine tumors of pancreas are usually malignant).', 'role': 'assistant'}]