This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Operative Gynaecology, Subject name: Gynaecology & Obstetrics
Best gas used for creating pneumoperitonium at laparoscopy is 
Select and explain. 
A. N2, B. O2, C. CO2, D. N2O
C: CO2
Answer: C: CO2 
Explanation: Ans. (c) CO2Ref: Shaws 15th ed. 1492Pnenumoperitoneum in created with CO2 or nitrous oxide. CO2 is preferred because nitrous oxide can cause explosion in the presence of volatile anaesthetic drug.