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': "A patient with increased metabolic rate, hyperthyroidism, goiter and have deposits of calcium in capsule of thyroid, it can be due to: \nSelect and explain. \nA. Follicular Carcinoma of thyroid, B. Medullary carcinoma of thyroid, C. De Quervain's thyroiditis, D. Riedel's thyroiditis", 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]