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': "What is the use of Murphy's eye present on the Endotracheal tube \nSelect and explain. \nA. It is alternate pathway for ventilation, B. It decreases the weight of tube, C. It is used for suctioning of respiratory treat along with ventilation, D. All of the above", 'role': 'user'}, {'content': "Answer: A \nExplanation: Murphy's eye is seen in the endotracheal tube (ETT). Murphy's eye refers to the distal opening in the side wall of the ETT. If the distal end of the lumen of the tube is blocked by secretions, Murphy's eye serves to provide an alternate route for ventilation.", 'role': 'assistant'}]