This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Diagnostic & Operative ENT, Subject name: ENT
[{'content': 'Most common frequency of Tuning fork used in ENT: \nSelect and explain. \nA. 256 Hz, B. 512 Hz, C. 1024 Hz, D. 2048 Hz', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. (b) 512 HzRef: Dhingra's ENT 5th ed. / 26* Tuning fork test can be performed using tuning fork of different frequencies such as: 128, 256, 512, 1024, 2048, 4096 Hz.* MC used/ ideal for routine clinical practice is of 512 Hz.* Tuning fork of lower frequencies produce sense of bone vibration while those of higher frequencies have a shorter decay time and are thus not routinely preferred.* Tests done with tuning fork:# Rinne's test# Webers test# Absolute bone conduction (ABC) test# Bing test# Gelle'stest# Lewis test", 'role': 'assistant'}]