This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Identification of Dead and Mass Disaster, Subject name: Forensic Medicine
[{'content': 'Faded tattoo mark can be visualized by? \nSelect and explain. \nA. Ultraviolet rays, B. Spectrophotometer, C. Ordinary light, D. X-ray', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Ultraviolet rays Latent tattoo marks (faded marks) can be visualized by:-o Use of ultraviolet light o Infrared photograpyo Rubbing the part and examining under magnifying glasso If tattoo marks are obscured by decomposition they can be visualized by treating with 3% H2O2.o Tattoo marks can be developed by treating the skin by 0.5% caustic potash.o Histopathology of local lymph nodes for pigment.", 'role': 'assistant'}]