This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Sexual offences and infanticide, Subject name: Forensic Medicine
[{'content': 'Which of the following is used in rape victims to determine the rupture of the hymen? \nSelect and explain. \nA. Gram rod, B. Glaister Keen rod, C. Gaba rod, D. Cylinder rod', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Glaister Keen rod is used for close examination of the hymen or the degree of its rupture. Ref - Krishan Vij 5th edition pg 314', 'role': 'assistant'}]