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
Which of the following method is not used to demonstrate old or faint tatoos? 
Select and explain. 
A. Magnifying lens, B. UV rays, C. Infrared photography, D. Laser
D: Laser
Answer: D: Laser 
Explanation: Laser is used to demonstrate old or faint tatoos .