This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology and breast, Subject name: Surgery
[{'content': 'A Central midline neck swelling is noted in a 4 yr old girl posted for tonsillectomy. The swelling is, painless. mobile, and cystic, just below the hyoid bone of size 2x1.1x1cm. U/S showed a thick walled cystic lesion. Management would include \nSelect and explain. \nA. Surgical removal, B. Antibiotics, C. Percutaneous aspiration, D. Chest X-ray', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Mid line cystic swelling, mostly just below hyoid is thyroglossal cyst. Treatment is surgical removal (Sistrunk operation).', 'role': 'assistant'}]