<prompt> Motorcyclist fracture among the following isRing fractureSutural separationComminuted fracture of vault of skull.Fracture base of skull into anterior posterior halves.  <response>: Ans. is d i.e. Fracture base of skull into anterior posterior halves The fracture of base of skull dividing it into two halves anterior posterior, each moving independently of each other like a hinge is specifically called as motor cyclist fracture.The fracture line runs across through the pituitary fossa and along the petrous temporal bones.Its a fatal injury occurs in many types of road accidents or due to a very heavy impact on one side of the head. 