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
[{'content': "Which of the following skull fractures is called a 'motorcyclist's fracture' - \nSelect and explain. \nA. Ring fracture of base of skull, B. Hinge fracture of base of skull, C. Comminuted fracture of skull, D. Depressed fracture of skull", 'role': 'user'}, {'content': "Answer: B \nExplanation: The synopsis of forensic medicine & toxicology ;Dr k.s narayan reddy; 28th edition ; pg.no.151 In motorcyclist 's fracture the fracture is seen at the base of the skull ,the base of skull is divided into two halves ,and each moves like a hinge .", 'role': 'assistant'}]