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': 'Gas most commonly used in laparoscopy is \nSelect and explain. \nA. CO2, B. SO2, C. N2, D. O2', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. is a i.e. CO2 CO2 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 CO2 for creating pneumoperitoneum 200 -- 2000 ml/min and pressure between 15 -- 25 mm of Hg.', 'role': 'assistant'}]