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: Medicine
[{'content': "Medullary carcinoma of the thyroid is associated with which of the following syndrome? \nSelect and explain. \nA. MEN I, B. MEN II, C. Fraumeni syndrome, D. Hashimoto's syndrome", 'role': 'user'}, {'content': 'Answer: B \nExplanation: MEN 1 is characterised by: Parathyroid hyperplasia or adenoma Islet cell hyperplasia, adenoma, or carcinoma Pituitary hyperplasia or adenoma Other, less common manifestations: foregut carcinoid, pheochromocytoma, subcutaneous or visceral lipomas MEN 2A: MTC (medullary thyroid carcinoma) Pheochromocytoma Parathyroid hyperplasia or adenoma MEN 2B: MTC (medullary thyroid carcinoma) Pheochromocytoma Mucosal and gastrointestinal neuromas Marfanoid features Ref: Harrisons principles of internal medicine, 18th edition, Page: 3072.', 'role': 'assistant'}]