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
Best gas used for creating pneumoperitonium at laparoscopy is: 
Select and explain. 
A. N2, B. O2, C. CO2, D. N20
C: CO2
Answer: C: CO2 
Explanation: None