<prompt> Motorcyclist fracture among the following is -Ring factureSutural separationComminuted fracture of vault of skullFracture base of skull into anterior posterior halves  <response>: 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 cyclists fracture. 