This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Identification, Subject name: Forensic Medicine
Commonly used long bone for identification - 
Select and explain. 
A. Femur, B. Radius, C. Ulna, D. Humerus
A: Femur
Answer: A: Femur 
Explanation: The best long bone for identification is femur. Ref: K.S.Narayan Reddy's synopsis of Forensic Medicine and Toxicology 29 th edition Chapter 4 page,43,45.