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: Anaesthesia
[{'content': 'Cuff pressure in Endotracheal intubation with prolonged ventilation should be less than? \nSelect and explain. \nA. 20 mm Hg, B. 30 mm Hg, C. 40 mm Hg, D. 50 mm Hg', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is'a'i.e., 20 mm HgRef.: Miller's Anacs Physiology 7/e Chap. 50Cuff pressure 18-22mmHg (25-30 cm H2O) is recommended.", 'role': 'assistant'}]