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
Ototoxic drugs generally affect the hearing of what frequencies of sound 
Select and explain. 
A. 500-1000 Hz, B. 2000-3000 Hz, C. 3000-4000 Hz, D. 4000-5000 Hz
D: 4000-5000 Hz
Answer: D: 4000-5000 Hz 
Explanation: 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.)