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
Hearing loss at 65dB, what will be the grade of the deafness? 
Select and explain. 
A. Mild, B. Moderate, C. Moderately severe, D. Severe
C: Moderately severe
Answer: C: Moderately severe 
Explanation: The degree of hearing loss is classified by Goodman`s classificationNormal10-15Minimal16-25Mild26-40Moderate41-55Moderately severe56-70Severe71-90Profound> 90Ref: Hazarika; 3rd ed; Pg 72