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': 'A Patient with TB under treatment complains of tinnitus and decreased hearing. Which drug is a causative factor: \nSelect and explain. \nA. lsoniazid, B. Streptomycin, C. Ethambutol, D. Pyrazinamide', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Streptomycin', 'role': 'assistant'}]