This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Forensic Medicine
[{'content': 'The non poisoning Salt of cyanide is : \nSelect and explain. \nA. Potassium cyanide, B. Hydrocyanic acid, C. Sodium cyanide, D. Potassium ferroc yanide', 'role': 'user'}, {'content': 'Answer: D \nExplanation: D i.e. Potassium ferrocyanide', 'role': 'assistant'}]