This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Toxicology, Subject name: Forensic Medicine
Cherry red postmortem staining is seen in 
Select and explain. 
A. Cyanide, B. Carbon monoxide, C. Nitrites, D. Phosphorus
B: Carbon monoxide
Answer: B: Carbon monoxide 
Explanation: Ans. is 'b' i.e., Carbon monoxide * Color of post-mortem staining in various poisoning:POISONCOLORCarbon mono-oxide and hypothermiaCherry redHCN, burnsBright redNitrites, potassium chlorate, potassium bicarbonateNitrobenzene, acetanilide, bromates, aniline (causing methaemoglobinuria)Chocolate or Copper brownPhosphorousDark brown or yellowHydrogen sulphideBluish green