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: Gynaecology & Obstetrics
Which of the following increases callus formation: 
Select and explain. 
A. Rigid immobilization, B. Movement at fracture site, C. Compression plating, D. Intraosseous nailing
B: Movement at fracture site
Answer: B: Movement at fracture site 
Explanation: Ans: B. Movement at fracture site (Ref Apley 9/e p689)Micro movements at fracture site encourages vascular proliferation -Increases callus formation.