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': "During rapid induction of anaesthesia – \nSelect and explain. \nA. Sellieck's maneuver is not required, B. Pre–oxygenation is mandatory, C. Suxamethonium is contraindicated, D. Patient is mechanically ventilated before endotracheal intubation", 'role': 'user'}, {'content': "Answer: B \nExplanation: During rapid sequence induction preoxygenation is done for full 3 minutes. Such is the muscle relaxant of choice for intubation. Sallieck's maneuver is done to prevent aspiration. Manual ventilation before intubation is avoided as this inflates the stomach and encourages regurgitation & aspiration.", 'role': 'assistant'}]