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': 'Exposure to 90 db and 4000Hz noise results in - \nSelect and explain. \nA. Auditory fatigue, B. Temporary hearing loss, C. Permanent hearing loss, D. Rupture of tympanic membrane', 'role': 'user'}, {'content': "Answer: A \nExplanation: Auditory fatigue is an effect of noise exposure. It appears in 90dB region and greatest at 4000Hz. May be associated with whistling and buzzing in ears. Other effects are deafness(temporary at 4000 to 6000 Hz), interference with speech, annoyance, reduced efficiency. Park's Textbook of Preventive and Social Medicine, 25th Edition, Pg 802", 'role': 'assistant'}]