This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Sexual Offenses, Subject name: Forensic Medicine
Tattoo marks if destroyed their presence can be inferred from the presence of pigment in: 
Select and explain. 
A. Deep dermis, B. Subcutaneous tissue, C. Regional lymph node, D. Skin of adjoining region
C: Regional lymph node
Answer: C: Regional lymph node 
Explanation: Ans. (C). Regional Lymph nodesThe regional lymph nodes show a deposition of pigment used in the tattoo.If the pigment is deposited below the epidermis, it will slowly become fainter and the pigments disappear in about 10 yearsSuch a faded tattoo may become visible by the use of UV lamp or Infrared photography.