This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.V.S, Subject name: Pharmacology
[{'content': 'Which of the following drug is an antidote for cyanide poisoning? \nSelect and explain. \nA. Amyl nitrate, B. Isosorbide dinitrate, C. Nitroglycerine, D. Propranolol', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. A. Amyl nitrateAmyl nitrite is one of antidote of cyanide poisoning. It is given via inhalational route. Hydroxocobalamin is also given for cyanide poisoning via intravenous route.', 'role': 'assistant'}]