This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Poisoning, Subject name: Forensic Medicine
[{'content': 'A body is brought for autopsy with a history of poisoning. On post-moem examination there is dark Brown postmoem staining and garlic order in the stomach. In this case, the poison is \nSelect and explain. \nA. Aniline dye, B. Phosphorus, C. Hydrocyanic acid, D. Carbonic acid', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Color of Post-Moem staining in some poisons Poison Color Carbon monoxide (CO) Cherry red Carbon dioxide (CO2) Deep blue (reducedhemoglobin) Cyanide Bright red/pink Phosphorus or copper Dark brown/yellow Hydrogen sulfide Bluish green Opiates Black Nitrites, aniline, nitrobenzene,chlorates (methemoglobinformation) Chocolate or coffee-brown Smell due to various poisons Poison Odor Phosphorus, heavy metal poisoning(arsenic, selenium, thallium), parathion,malathion, alphos Garlic-like Ethanol, methyl or propyl alcohol,chloroform, nitrites, acetone Sweet and fruity Paraldehyde, chloral hydrate Acrid H2S, mercaptans, disulfirum Rotten eggs HCN Bitter almond Carbolic acid Phenolic Organophosphates Kerosene-like Zinc phosphide Fishy Methyl salicylates Oil of wintergreen Marijuana Burnt rope, hemp Ref - Krishan Vij 5th edition pg: 123 ,504,538', 'role': 'assistant'}]