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': 'It is a common fact that sex chromatin cannot be made out in badly decomposed bodies. Upto how long after death can fluorescent dyes demonstrate Y chromosomes in the dental pulp? \nSelect and explain. \nA. 3 months, B. 6 months, C. 9 months, D. 12 months', 'role': 'user'}, {'content': 'Answer: D \nExplanation: By using fluorescent dye Y chromosome can be demonstrated in dental pulp tissue upto 1 year. F.bodies are seen in 30 - 70% of cells in males. Also know: F.bodies may also be seen in up to 0 - 4% in females Ref: Textbook of Forensic Medicine and Toxicology by Narayan Reddy, Edition 21, Page - 51.', 'role': 'assistant'}]