This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Surgery
Nonunion is a very common complication of intracapsular fractures of the neck of femur. Which of the following is not a very impoant cause for the same? 
Select and explain. 
A. Inadequate immobilization, B. Inadequate blood supply, C. Inhibitory effect of synol fluid, D. Stress at fracture site due to muscle spasm
D: Stress at fracture site due to muscle spasm
Answer: D: Stress at fracture site due to muscle spasm 
Explanation: D i.e. Stress at fracture site due to muscle spasm