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: Surgery
22 Gauge iv cannula colour is 
Select and explain. 
A. Green, B. Grey, C. Blue, D. Pink
C: Blue
Answer: C: Blue 
Explanation: Orange : 14G
Gray : 16G
Green : 18G
Pink : 20G
Blue : 22G
Yellow : 24G