<prompt> Chocolate Brown postmoem staining is seen in -KCI PoisoningOpium PoisoningH S PoisoningCyanide poisoning  <response>: 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. 