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 method is not used to demonstrate old or faint tatoos? \nSelect and explain. \nA. Magnifying lens, B. UV rays, C. Infrared photography, D. Laser', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Laser is\xa0used to demonstrate old or faint tatoos .', 'role': 'assistant'}]