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
Dignostic sign of a fracture- 
Select and explain. 
A. Abnormal mobility at fracture site, B. Pain at the fracture site, C. Tenderness, D. Swelling
A: Abnormal mobility at fracture site
Answer: A: Abnormal mobility at fracture site 
Explanation: Ans. is 'a' i.e., Abnormal mobility at fracture site