This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Important complications in orthopaedics, Subject name: Orthopaedics
Non-union is common in fracture of 
Select and explain. 
A. Scapula, B. Talus, C. Neck of femur, D. Tibial fracture
C: Neck of femur
Answer: C: Neck of femur 
Explanation: The following are some of the clinical findings which suggest delayed union and non union : Persistent pain Pain on stressing the fracture Mobility (in non-union) Increasing deformity at the fracture site (in non-union). Ref essential ohopaedic maheshwari and mhaskar 9TH ED p 48