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': 'Which of the following antitubercular drug is not hepatotoxic : \nSelect and explain. \nA. Isoniazid, B. Rifampicin, C. Ethionamide, D. Streptomycin', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Streptomycin and ethambutol are not hepatotoxic. Read carefully, option (c) is ethionamide, not ethambutol.', 'role': 'assistant'}]