This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Surgery
[{'content': 'Cricothyrotomy is converted to tracheostomy \nSelect and explain. \nA. To avoid hypoxia, B. To avoid subglottic stenosis, C. To facilitate oxygenation, D. Easy consumption of food', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. (B) To avoid subglottic stenosisRef: Bailey and Love Page 695* To avoid subglottic stenosis if we give ventilation via the cricothyrotomy tube we must change it to Tracheostomy at the earliest.', 'role': 'assistant'}]