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
In CO poisoning, immediate emergency treatment: Jharkhand 10 
Select and explain. 
A. 5% CO2 inhalation, B. 10% CO2 inhalation, C. High flow O2, D. Nitroglycerine
C: High flow O2
Answer: C: High flow O2 
Explanation: Ans. High flow O2