This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Environment and health, Subject name: Social & Preventive Medicine
[{'content': 'The decibels above which auditory fatigue occurs is \nSelect and explain. \nA. 60 db, B. 70 db, C. 85 db, D. 140 db', 'role': 'user'}, {'content': 'Answer: C \nExplanation: A daily exposure up to 85db is about the limit people can tolerate without substantial damage to their hearing.Auditory fatigue: It appears in the 90dB region and greatest at 400Hz. It may be associated with side effects such as whistling and buzzing in the ears.Park 23e pg: 742', 'role': 'assistant'}]