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': 'A 6 year old presents with a swelling which seems to be fluid filled translucent mass in supraclavicular area. It most likely represents: \nSelect and explain. \nA. Throglossal duct Cyst, B. Branchial cyst, C. Cystic hygroma, D. Lymphoma', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Cystic hygroma', 'role': 'assistant'}]