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 child presents with an expansile swelling on medial side of the nose. Likely diagnosis is: \nSelect and explain. \nA. Teratoma, B. Meningcoele, C. Dermoid cyst, D. Lipoma', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Meningocoele presents as a cystic swelling which is expansile, transluscent, compressible and shows a positive fluctuation test. One of the common site is root of nose. Ref: Surgical Sho Cases By S. Das, 2nd Edition, Pages 88-89.', 'role': 'assistant'}]