<prompt> Which of the following prevents aspiration?LMAOropharyngeal airwayNasopharyngeal airwayProseal LMA  <response>: Ans. is d i.e., Proseal LMA Ref: Understanding Paediatric Anaesthesia Tde 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. 