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
Non-union is a complication of which of the following ? 
Select and explain. 
A. Scaphoid fracture, B. Colle's fracture, C. Inter-trochanteric fracture of hip, D. Supracondylor fracture of the humerus
A: Scaphoid fracture
Answer: A: Scaphoid fracture 
Explanation: 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.