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
Antidote for cyanide poison is: March 2012 
Select and explain. 
A. Sodium bicarbonate, B. Sodium chloride, C. Sodium thiosulphate, D. All of the following
C: Sodium thiosulphate
Answer: C: Sodium thiosulphate 
Explanation: Ans: C i.e. Sodium thiosulphate Cyanide is directly conveed to thiocyanate (non-toxic; excreted in the urine) by the complexing of cyanide with thiosulphate under the influence of the enzyme rhodanase.