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: Forensic Medicine
Which bone is not useful for sex determination? 
Select and explain. 
A. Pelvis, B. Skull, C. Clavicle, D. Femur
C: Clavicle
Answer: C: Clavicle 
Explanation: Important bones used for sex determination are skull, mandible, pelvis, vertebra, femur