This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Peritoneum, Subject name: Surgery
[{'content': 'Which is the most frequently used gas for laproscopy? \nSelect and explain. \nA. Carbon Dioxide, B. Helium, C. Nitrogen, D. Oxygen', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Carbon Dioxide o CO2 is the most common gas used to create surgical pneumoperitoneumo Other gases that have been tried are:a) Heliumb) Nitrous Oxide", 'role': 'assistant'}]