This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Pathophysiology - Neoplasms, Subject name: Surgery
[{'content': 'Which is not true regarding Insulinoma : \nSelect and explain. \nA. Hypoglycemic attacks, B. Weight loss, C. Usually Solitary tumor, D. Mostly benign tumor', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' ie Weight loss Hypoglycemic attack are part of Whipple's triadInsulinoma is usually solitary tumorOnly 5 to 15% are malignant", 'role': 'assistant'}]