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: Anaesthesia
Sodium nitroprusside infusion may result in: 
Select and explain. 
A. Hypeension, B. Pulmonary oedema, C. Cyanide toxicity, D. Hea block
C: Cyanide toxicity
Answer: C: Cyanide toxicity 
Explanation: C i.e. Cyanide toxicity Sodium nitropruside has five cyanide groups within its structure and cyanide toxicityQ is a problem if it is used is high doses. Its formula is Na2[Fe(CN)5NOJX2H2O