All of the following are example of definite airways,except –

Definite airways (that protect from aspiration) are :- Endotracheal intubation (oro-tracheal or naso-tracheal) and Surgical airways (tracheostomy, cricothyroidotomy). Airways that are not definite (do not adequately protect from aspiration) are :- Nasopharyngeal airway, oropharyngeal airway, LMA.