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: ENT
[{'content': 'Red line in pure tone audiometry is for - \nSelect and explain. \nA. Bone conduction, B. Air conduction, C. Right ear, D. Left ear', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Right ear", 'role': 'assistant'}]