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': 'Which of the following levels of lymphnodes are first involved by papillary carcinoma? \nSelect and explain. \nA. Level II, B. Level IV, C. Level V, D. Level VI', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Pretracheal / Prelaryngeal are involved at First by papillary carcinoma of thyroid, which are Level VI neck lymph nodes.', 'role': 'assistant'}]