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: Gynaecology & Obstetrics
Which of the following gas is commonly used in laparoscopic procedures? 
Select and explain. 
A. Air, B. Pure 02, C. N20, D. C02
D: C02
Answer: D: C02 
Explanation: CO2 is used for insufflation during endoscopic procedures (e.g., laparoscopic surgery) because it is highly soluble and does not suppo combustion. Inadveent gas emboli thus are dissolved and eliminated more easily by the respiratory system. Ref: Patel P.M., Patel H.H., Roth D.M. (2011). Chapter 19. General Anesthetics and Therapeutic Gases. In B.C. Knollmann (Ed), Goodman & Gilman's The Pharmacological Basis of Therapeutics, 12e.