This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anatomy of Bone & Fracture Healing, Subject name: Orthopaedics
[{'content': "Non - union is a complication of: \nSelect and explain. \nA. Scaphoid, B. Colle's, C. Inter- trochanteric of hip, D. Supra condylor of the humerus", 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e. Scaphoid Commonly the Scaphoid occurs through its waist.*In through the waist there is a high probability, of avascular necrosis of the proximal fragment*Common sites of nonunion of *:Scaphoid*Lower third of ulna *Lateral condyles of humerus*Neck of femur*lower third of tibia*Talus*Common sites of malunion of *s:Colie's*Supracondylar *intertrochanteric *", 'role': 'assistant'}]