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
Most common frequency of Tuning fork used in ENT 
Select and explain. 
A. 256 Hz, B. 512 Hz, C. 1024 Hz, D. 2048 Hz
B: 512 Hz
Answer: B: 512 Hz 
Explanation: Tuning fork test can be performed using tuning fork of different frequencies such as:
. • 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
■ Weber's test
■ Absolute bone conduction (ABC) test
■ Bing test
■ Gelle’s test
■ Lewis test