This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cardiovascular system, Subject name: Pharmacology
Mechanism of action of sodium nitrite in Cyanide poisoning is? 
Select and explain. 
A. Produces methemoglobinemia, B. Increased blood flow to liver, C. Increased blood flow to hea, D. Increased blood flow to kidney
A: Produces methemoglobinemia
Answer: A: Produces methemoglobinemia 
Explanation: Sodium nitrite conves haemoglobin to methemoglobin and this methemoglobin combines with cyanide to form nontoxic cyanmethemoglobin. This cyanmethb will be excreted from the body trough urine REF: Essentials of Medical Pharmacology KD Tripathi 8th ed.