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
The below finding was seen in a person who died 4 hours ago due to chronic anemia and renal failure. What is the finding called? 
Select and explain. 
A. Bitot's spots, B. Kevorkian sign, C. Postmortem pterygium, D. Tache noire
D: Tache noire
Answer: D: Tache noire 
Explanation: Tache noire : It is due to drying and deposition of dust and cellular debris. It occurs 3-4 hours after death.