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 at 65dB, what will be the grade of the deafness? \nSelect and explain. \nA. Mild, B. Moderate, C. Moderately severe, D. Severe', 'role': 'user'}, {'content': 'Answer: C \nExplanation: The degree of hearing loss is classified by Goodman`s classificationNormal10-15Minimal16-25Mild26-40Moderate41-55Moderately severe56-70Severe71-90Profound> 90Ref: Hazarika; 3rd ed; Pg 72', 'role': 'assistant'}]