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': 'All of the following are complications of burns except \nSelect and explain. \nA. Ectropion of eyelid, B. Macrostomia, C. Hypertrophic scar, D. Corneal ulcer', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Burns contracture causes microstomia.', 'role': 'assistant'}]