This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Identification, Subject name: Forensic Medicine
Tattooing in old decomposed body can be visualized by use of all except - 
Select and explain. 
A. H2O2 3%, B. Gamma rays, C. Infrared photography, D. Examination with magnifying glass
B: Gamma rays
Answer: B: Gamma rays 
Explanation: Tattoo in decomposed bodies can be visualised by 3% hydrogen peroxide, infrared photography and magnification glass in decomposed bodies. It is a method of identification. Ref: K.S.Narayan Reddy's Synopsis of Forensic Medicine and Toxicology, 29th edition, Chapter 4, page-56.