This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pharmacology
Which of the following mechanism is mainly responsible for gentamicin induced ototoxicity ? 
Select and explain. 
A. Direct hair cell toxicity, B. Binding to and inhibition of hair cell Na+ K+ ATPase, C. Non–cumulative toxicity, D. Bind to Ca2+ channels
A: Direct hair cell toxicity
Answer: A: Direct hair cell toxicity 
Explanation: None