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
Non union is a common feature of fracture of 
Select and explain. 
A. Supracondylar humerus, B. Clavicle, C. Lower tibia, D. Coracoid process
C: Lower tibia
Answer: C: Lower tibia 
Explanation: 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.