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': 'All of the following are example of definite airways,except – \nSelect and explain. \nA. Nasotracheal tube, B. Orotracheal tube, C. Laryngeal Mask airway, D. Cricothyroidotomy', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Definite airways (that protect from aspiration) are :- Endotracheal intubation (oro-tracheal or naso-tracheal) and Surgical airways (tracheostomy, cricothyroidotomy).\nAirways that are not definite (do not adequately protect from aspiration) are :- Nasopharyngeal airway, oropharyngeal airway, LMA.', 'role': 'assistant'}]