This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Thyroid Gland, Subject name: Surgery
[{'content': 'Sistrunk operation used for \nSelect and explain. \nA. Thyroglossal Cyst, B. Branchial Cyst, C. Cystic Hygroma, D. Laryngocele', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. (a) Thyroglossal CystRef Sabiston 20th edition Page 1861* Sistrunk operation involves complete excision of the cyst in continuity with its tract, the central portion of the hyoid bone, and the tract interior to the hyoid bone extending to the base of the tongue', 'role': 'assistant'}]