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
Carbon monoxide poisoning shows the following post-moem staining: 
Select and explain. 
A. Cherry red postmoem staining, B. Pink postmoem staining, C. Chocolate coloured postmoem staining, D. Blue postmoem staining
A: Cherry red postmoem staining
Answer: A: Cherry red postmoem staining 
Explanation: In carbon monoxide poisoning, the colour of post moem staining is cherry-red. In poisoning by nitrites, potassium chlorate, potassium bicarbonate, nitrobenzene, acetanilide, bromates, and aniline the colour is chocolate brown. In asphyxia, the colour of the stains is deeply bluish-violet or purple. A bright pink colour is seen in hypothermia and bodies taken from cold water. Ref: The Essentials of Forensic Medicine and Toxicology by KS Narayan Reddy, 27th edition, Page 139.