This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Plastic Surgery of the Head and Neck, Subject name: Surgery
[{'content': 'Abbey estender flap is based on: \nSelect and explain. \nA. Lingual artery, B. Facial artery, C. Labial artery, D. Internal maxillary artery', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e. Labial artery A flap is a skin graft which has its own blood supply. (Normally a skin graft to survive is revascularized by the recipient bed. A flap has its own blood supply.)Abbey flap is used for Lip reconstruction. It is based on main artery of the orbicularis oris, the labial artery.", 'role': 'assistant'}]