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: Biochemistry
[{'content': "Medullary carcinoma of the thyroid is associated with which of the following syndrome: \nSelect and explain. \nA. MEN I, B. MEN II A, C. Fraumeni syndrome, D. Hashimoto's thyroiditis", 'role': 'user'}, {'content': "Answer: B \nExplanation: MEN 2A (Sipple syndrome) is associated with medullary thyroid carcinoma, pheochromocytoma and parathyroid adenoma. Neural crest tumors associated with it are gliomas, glioblastoma and meningioma. Ref: Essentials of Rubin's Pathology By Emanuel Rubin, 5th Edition, Page 486.", 'role': 'assistant'}]