This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General surgery, Subject name: Surgery
[{'content': 'Abbe-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: Abbey-Estlander flap is used in the reconstruction of lip It is a full-thickness lip-switch flap rotated from mid-lower lip to fill defects of the upper lip Based on sublabial or superior labial aery Used in cleft lip, or defects of lip post trauma, cancer surgeries Sabiston 20th edition Pg: 142', 'role': 'assistant'}]