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': 'What should be the least hearing loss for Weber test to lateralize? \nSelect and explain. \nA. 5 dB, B. 10 dB, C. 15 dB, D. 20 dB', 'role': 'user'}, {'content': 'Answer: A \nExplanation: In normal Individuals - No lateralization of sound occurs as Bone conduction of both ears in normal and equal. In conductive deafness - Lateralization of sound occurs to the diseased ear. In SNHL - Lateralization of sound occurs to the better ear. Webers is a very sensitive test and even less than 5 dB difference in 2 ears hearing level can be indicated.', 'role': 'assistant'}]