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': 'Detonator cap situated at : \nSelect and explain. \nA. Top of the bullet, B. Side of the bullet case, C. Base of the rim, D. None of them', 'role': 'user'}, {'content': 'Answer: C \nExplanation: C i.e. Base of rim', 'role': 'assistant'}]