<prompt> Which of the following drug is an antidote for cyanide poisoning?Amyl nitrateIsosorbide dinitrateNitroglycerinePropranolol  <response>: 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. 