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': 'Occult thyroid malignancy with nodal metastases is seen in \nSelect and explain. \nA. Medullary carcinoma, B. Follicular carcinoma, C. Papillary carcinoma, D. Anaplastic carcinoma', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]