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': 'Which of the following is not true regarding cryosurgery: March 2011 \nSelect and explain. \nA. Done without anaesthesia, B. Temperature is below freezing point, C. Done in CIN, D. Nitrous oxide is widely used', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. D: Nitrous oxide is widely used Cryosurgery is suited for small lesions (dysplasia and CIN) It is done as an OPD procedure without analgesia CO2 (-60 degree C), Freon (-60 degree C) and nitrous oxide (-80 degree C) are the freezing agents', 'role': 'assistant'}]