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
True regarding Hangman's fracture is: 
Select and explain. 
A. Odotoid process fracture of C2, B. Spondylolisthesis of C2 over C3, C. Whiplash injury, D. Fracture of hyoid bone
B: Spondylolisthesis of C2 over C3
Answer: B: Spondylolisthesis of C2 over C3 
Explanation: B i.e. Spondylolisthesis of C2 over C3