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': 'Thyroid carcinoma associated with hypocalcemia is \nSelect and explain. \nA. Follicular carcinoma, B. Medullary carcinoma, C. Anaplastic carcinoma, D. Papillary carcinoma', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Answer is B (Medullary Carcinoma) Medullary carcinoma of thyroid secretes calcitonin and this causes reduction in calcium levels.', 'role': 'assistant'}]