This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Death and Investigations, Subject name: Forensic Medicine
Motorcyclist fracture among the following is 
Select and explain. 
A. Ring fracture, 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: 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.It's a fatal injury & occurs in many types of road accidents or due to a very heavy impact on one side of the head.