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': 'Non union is a common feature of fracture of \nSelect and explain. \nA. Supracondylar humerus, B. Clavicle, C. Lower tibia, D. Coracoid process', 'role': 'user'}, {'content': 'Answer: C \nExplanation: C i.e. Lower tibia Fracture through the lower third of tibia. is more liable to go onto delayed union because the lower fragment becomes relatively avascular dlt poor vascularityQ.', 'role': 'assistant'}]