This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Thyroid Malignancies, Subject name: Surgery
[{'content': 'Cancer that arises from C-cells of thyroid \nSelect and explain. \nA. Follicular, B. anaplastic, C. Papillary, D. Medullary', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. (d) medullaryRef: Bailey and Love 26th ed. ch. 5 / 741Medullary thyroid cancer grows from specialized thyroid cells called parafollicular C-cells which are specialized thyroid cells that secrete calcitonin and play a major role in medullary thyroid cancer.', 'role': 'assistant'}]