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': 'In the management of thyroglossal cyst - \nSelect and explain. \nA. Central portion of hyoid excised, B. Sternothyroid muscle dissected, C. Isthmusectomy with subtotal thyroidectomy, D. Strap muscle of neck are dissected', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Thyroglossal cyst is managed by Sistrunk operation in which the cyst is completely excised along with the thyroglossal tract. Since the thyroglossal tract is intimately related to the hyoid bone, the central portion of the hyoid bone is also removed.', 'role': 'assistant'}]