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': 'Auditory fatigue is seen at - \nSelect and explain. \nA. 90 dB, 4000Hz, B. 110 dB, 4000Hz, C. 130 dB, 4000Hz, D. 150 dB, 4000Hz', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]