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': 'Elephant foot deformity is indicative of \nSelect and explain. \nA. Diplopia, B. Non-union of fractured edentulous mandible, C. Skeletal Class II malocclusion, D. Unilateral Le Fort I fracture of maxilla', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]