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': 'The following is not a hepatotoxic antitubercular drug: \nSelect and explain. \nA. Ethambutol, B. INH, C. Rifampicin, D. Pyrazinamide', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ethambutol', 'role': 'assistant'}]