This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Ear, Subject name: ENT
[{'content': 'Lombard&;s test is used in diagnosis of \nSelect and explain. \nA. Conductive hearing loss, B. Sensorineural hearing loss, C. Mixed hearing loss, D. Non-organic hearing loss', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Lombard&;s test: This test is based on "Lombard&;s principle". This principle says that one raises his / her voice when speaking in the noisy environment. While performing this test, the patient is allowed to read a book. Noise is introduced into the ear. The noise is gradually increased till the patient raises his / her voice or stops the process of reading. If there is no change in voice loudness level the patient does not have a functional hearing defect.', 'role': 'assistant'}]