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': 'Hearing loss of 65dB, what is the grade of deafness- \nSelect and explain. \nA. Mild, B. Moderate, C. Severe, D. Moderately severe', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., Moderately severe o WHO recommended the following classification on the basis of pure tone audiogram.Hearing threshold in better ear (average of 500,1000,2000Hz)Degree of impairment (WHO classification)Ability to understand speech0-25Not significantNo significant difficulty with faint speech2640MildDifficulty with faint speech.41-55ModerateFrequent difficulty with normal speech.56-70Moderately severeFrequent difficulty even with loud speech71-91SevereCan understand only shouted or amplified speechAbove 91ProfoundUsually cannot understand even amplified speech", 'role': 'assistant'}]