This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Toxicology - 1, Subject name: Forensic Medicine
[{'content': 'In cyanide poisoning, the specimen of blood must be covered with what to avoid evaporation \nSelect and explain. \nA. Saturated salt solution, B. Formalin, C. Liquid paraffin, D. Acetone', 'role': 'user'}, {'content': "Answer: C \nExplanation: - In cyanide poisoning, the specimen of blood must be covered with liquid paraffin to avoid evaporation. CYANIDE POISONING : - ideal suicidal poison, - Cyanide inhibits cytochrome oxidase (ETC) - Histotoxic anoxia - Managed with Lilly's antidote Vitamin B12 Dicobalt EDTA", 'role': 'assistant'}]