This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Head and neck, Subject name: Anatomy
[{'content': 'In management of thyroglossal cyst \nSelect and explain. \nA. Nodes of neck are removed, B. Sternocleidomastoid muscle is dissected, C. Central poion of thyroid is excised, D. Subtotal thyroidectomy is done', 'role': 'user'}, {'content': 'Answer: C \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 poion of the hyoid bone is also removed. Ref : S. Das Op. Surgery 4/e p201', 'role': 'assistant'}]