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': 'Hyoid bone is closely associated with - \nSelect and explain. \nA. Bronchiogenic cyst, B. Cystic hygroma, C. Thyroglossal cyst/fistula, D. Branchial cyst', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Hyoid bone is closely associated with the thyroglossal tract from which thyroglossal cyst & fistula originate, thus during surgical excision of the thyroglossal cyst or fistula, the central part of the hyoid bone is excised (otherwise recurrence may occur).', 'role': 'assistant'}]