This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anatomy and physiology of bone and fracture healing, Subject name: Orthopaedics
[{'content': "Non-union is a complication of which of the following ? \nSelect and explain. \nA. Scaphoid fracture, B. Colle's fracture, C. Inter-trochanteric fracture of hip, D. Supracondylor fracture of the humerus", 'role': 'user'}, {'content': 'Answer: A \nExplanation: Sites of non union : Femur neck fracture Scaphoid fracture Tibia fracture Lateral condyle humerus fracture Fracture lower 3rd ulna Radiological features of nonunion of scaphoid: Rounding of fracture surfaces Fractures become sharply defined Cystic changes occur in one or both fragments Ref: Maheshwari and Mhaskar 9th ed pg 116.', 'role': 'assistant'}]