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
[{'content': 'Best gas used for creating pneumoperitonium at laparoscopy is : \nSelect and explain. \nA. N2, B. 2, C. CO2, D. N20 Goniometer is used', 'role': 'user'}, {'content': 'Answer: C \nExplanation: CO2 CO, is the gas used to create pneumoperitoneum during laparoscopy. Other option is - N20 : But it is expensive, less soluble in blood and suppos combustion. Also know : Instrument used for creating pneumoperitoneum is veress needle. Flow Rate of CO, for creating pneumoperitoneum 200 - 2000 ml/min & pressure between 15 - 25 mm of Hg.', 'role': 'assistant'}]