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': 'Ototoxic drugs generally affect the hearing of what frequencies of sound \nSelect and explain. \nA. 500-1000 Hz, B. 2000-3000 Hz, C. 3000-4000 Hz, D. 4000-5000 Hz', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ototoxic drugs affect hearing at a range of 4000-6000kHz. Most common drugs include aminoglycoside such as Gentamycin (Ref: The EAR comprehensive ontology by Rinaldo and Paul.)', 'role': 'assistant'}]