The following are multiple choice questions (with answers) about medical knowledge.   **Question:** A 67-year-old man with transitional cell carcinoma of the bladder comes to the physician because of a 2-day history of ringing sensation in his ear. He received this first course of neoadjuvant chemotherapy 1 week ago. Pure tone audiometry shows a sensorineural hearing loss of 45 dB. The expected beneficial effect of the drug that caused this patient's symptoms is most likely due to which of the following actions?   (A) Inhibition of proteasome   (B) Hyperstabilization of microtubules   (C) Generation of free radicals   (D) Cross-linking of DNA
['(D) Cross-linking of DNA <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Inhibition of proteasome \n (B) Hyperstabilization of microtubules \n (C) Generation of free radicals \n (D) Cross-linking of DNA <> possible answers', "  A 67-year-old man with transitional cell carcinoma of the bladder comes to the physician because of a 2-day history of ringing sensation in his ear. He received this first course of neoadjuvant chemotherapy 1 week ago. Pure tone audiometry shows a sensorineural hearing loss of 45 dB. The expected beneficial effect of the drug that caused this patient's symptoms is most likely due to which of the following actions? <> context@"]