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 deafness \nSelect and explain. \nA. Mild, B. Moderate, C. Moderately severe, D. Severe', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ref: Dhingra 7e pg 41.', 'role': 'assistant'}]