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
Use of Intraaerial cannula in major surgery : 
Select and explain. 
A. Measurement of direct intra aerial BP, B. Sample for ABG, C. Drug injection, D. All
D: All
Answer: D: All 
Explanation: D. i.e. All