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': 'The most common level of thyroglossal cyst is: \nSelect and explain. \nA. Lingual, B. Infra-Lingual (caecum), C. Supra-hyoid, D. Infra-hyoid', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]