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': 'Treatment of choice of cystic hygroma \nSelect and explain. \nA. Percutaneous aspiration, B. Intralesional sclerosant injection, C. En Block resection, D. Surgical excision', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Surgical excision is most definitive treatment of cystic hygroma. Other treatments include Sclerotherapy and cautery etc.', 'role': 'assistant'}]