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': 'Abbey-Estlander flap is used in the reconstruction of: \nSelect and explain. \nA. Buccal mucosa, B. Lip, C. Tongue, D. Palate', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]