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
All of the following are example of definite airways,except – 
Select and explain. 
A. Nasotracheal tube, B. Orotracheal tube, C. Laryngeal Mask airway, D. Cricothyroidotomy
C: Laryngeal Mask airway
Answer: C: Laryngeal Mask airway 
Explanation: 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.