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 person on anti–tubercular drugs complained of deafness and tinnitus in one ear. Drug implicated is : \nSelect and explain. \nA. Streptomycin, B. Isoniazid, C. Ethambutol, D. Rifampicin', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]