This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Orthopaedics
All the following are responsible for the increased incidence of Non-Union following Fracture neck of the femur except 
Select and explain. 
A. Vascular compromise, B. Inadequate immobilization, C. Presence of synol fluid, D. Distracting force vector
B: Inadequate immobilization
Answer: B: Inadequate immobilization 
Explanation: In adequate immobilization is not one impoant factor which is responsible for non union as in other fractures, vascular compromise is an impoant cause. Synol fluid is supposed to exe an inhibitory effect by dissolving the callus. Ref: Maheshwari 6e pg 137.