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': 'The following fractures are known for Non-union except: \nSelect and explain. \nA. Fracture of lower half of tibia, B. Fracture of neck of femur, C. Fracture of scaphoid, D. Supracondylar fracture of humerus', 'role': 'user'}, {'content': 'Answer: D \nExplanation: D i.e. Supracondylar humerus The distal humeral metaphysis (supra condylar area) is a well vascularized area with remarkably rapid healing and nonunion of a supracondylar fracture is extremely rareQ. Nonunion is almost never seen without infection (open wounds) and /or extensive soft tissue devascularization.', 'role': 'assistant'}]