This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Mechanical injuries, Subject name: Forensic Medicine
Motorcyclist fracture among the following is - 
Select and explain. 
A. Ring facture, B. Sutural separation, C. Comminuted fracture of vault of skull, D. Fracture base of skull into anterior & posterior halves
D: Fracture base of skull into anterior & posterior halves
Answer: D: Fracture base of skull into anterior & posterior halves 
Explanation: The synopsis of forensic medicine & toxicology ;Dr k.s narayan reddy ; 28th edition ; pg.no. 151 . At autopsy the base of the skull is seen divided into 2 halves each moving independently of each other like a hinge ,it is called motor cyclist's fracture.