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': 'Tuning fork of 512 FPS is used to test the hearing because it is - \nSelect and explain. \nA. Better heard, B. Better felt, C. Produces over tones, D. Not heard', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Tuning fork tests can be done with tuning forks of different frequencies like 128, 256, 512, 1024, 2018 and 4096 Hz but most\xa0commonly used is 512 Hz because\n\n“Tests are done with various tuning forks, but 512 Hz is the most commonly used as it has longer tone decay and sound is\xa0quite distinct from ambient noise.”\nForks of lower frequencies produce a sense of bone vibration while those of higher frequency have a shorter decay time\xa0and therefore not commonly used\n\nRef. Tuli 1/e, p 28', 'role': 'assistant'}]