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': 'Which of the following prevents aspiration? \nSelect and explain. \nA. LMA, B. Oropharyngeal airway, C. Nasopharyngeal airway, D. Proseal LMA', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., Proseal LMA [Ref: Understanding Paediatric Anaesthesia Td/e p. 141A type of definite airwayDefinite airway is an airway that is adequately secured in trachea and it adequately protect the airway from aspiration.ProSeal (PLMA), a modification of Classic LMA, has a gastric drainage tube placed lateral to main airway tube which allows the regurgitated gastric contents to bypass the glottis and prevents the pulmonary aspiration.", 'role': 'assistant'}]