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': 'For thyroglossal cyst M.C. site is - \nSelect and explain. \nA. Suprahyoid, B. Subhyoid, C. Foramen caecum, D. Anterior border of sternomastoid', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]