This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Death and postmortem changes, Subject name: Forensic Medicine
Chocolate Brown postmoem staining is seen in - 
Select and explain. 
A. KCI Poisoning, B. Opium Poisoning, C. H S Poisoning, D. Cyanide poisoning
A: KCI Poisoning
Answer: A: KCI Poisoning 
Explanation: In poisoning by nitrites, potassium chlorate, nitrobenzene, potassium bicarbonate and aniline the colour of postmoem hypostasis is chocolate brown due to methhemoglobinemia. Dr.Narayana Reddys Synopsis of Forensic Medicine and Toxicology 27th edition pg. 76.