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: Social & Preventive Medicine
Extremely axle insecticide according to WHO classification, are coded as: 
Select and explain. 
A. Red, B. Green, C. Yellow, D. Blue
A: Red
Answer: A: Red 
Explanation: Answer- A. RedExtremely toxic insecticide, according to WHO classification, is coded as Red.