This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, 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: B i.e. Hinge fracture of base of skull Guide to forensic medicine & toxicology: Jain (2004) p 98] Hinge fracture of base of skull, in which the base of skull is divided into two halvesQ, each moving independently of each other like a hinge, is termed as motor cyclest's facture.", 'role': 'assistant'}]