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': 'Treatment of papillary carcinoma thyroid with level VI lymph\nnode metastasis is \nSelect and explain. \nA. Total thyroidectomy, B. Total thyroidectomy + central neck dissection, C. Total thyroidectomy + radioiodine ablation, D. Total thyroidectomy + radical neck dissection', 'role': 'user'}, {'content': 'Answer: B \nExplanation: IF level VI is affected then CND is done. If any other LN is involved then modified radical neck dissection is preferred.', 'role': 'assistant'}]