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: Social & Preventive Medicine
[{'content': 'Prolonged exposure to noise levels greater than the following can impair hearing permanently ? \nSelect and explain. \nA. 40 decibels, B. 85 decibels, C. 100 decibels, D. 140 decibels', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., 100 decibels", 'role': 'assistant'}]