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
[{'content': 'Mechanism which is responsible for gentamicin ototoxicity is: \nSelect and explain. \nA. Accumulation of drug metabolites., B. Direct hair cell toxicity., C. Inhibition of Na-K ATPase channels., D. All of the above.', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ototoxicity involves progressive and irreversible damage to, and eventually destruction of, the sensory cells in the cochlea and vestibular organ of the ear.', 'role': 'assistant'}]