This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Thyroid Tumor, Subject name: Pathology
[{'content': 'All of the thyroid tumor arises from follicular epithelial cell except: \nSelect and explain. \nA. Papillary carcinoma, B. Follicular carcinoma, C. Medullary carcinoma, D. Anaplastic carcinoma', 'role': 'user'}, {'content': "Answer: C \nExplanation: - Medullary Cancer arises from parafollicular cells or 'C' cells of thyroid associated with secretion of calcitonin. - Remaining all variants ; papillary, follicular, anaplastic thyroid cancers arise from follicular epithelial cells of thyroid", 'role': 'assistant'}]