This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Airway, Subject name: Anaesthesia
[{'content': "Murphy's eye is pa of which of the following devise:- \nSelect and explain. \nA. Endotracheal tube, B. Laryngeal mask airway, C. Anesthesia face mask, D. Mapleson circuit", 'role': 'user'}, {'content': 'Answer: A \nExplanation: It is the pa of Endotracheal tube just distal to proximal opening. Size of ETT Adult Male : 8mm ID-9mm ID Adult Female :7mm ID-8mm ID Pediatric <6yrs Age/4 + 4.5mm ID >6yrs Age/3 + 3.5mm ID', 'role': 'assistant'}]