This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bacterial infections, Subject name: Dental
[{'content': 'Which of the following is not approved for treatment of leprosy \nSelect and explain. \nA. Ofloxacin, B. Minocycline, C. Azathioprine, D. Clarithromycin', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ref Harrison20th edition pg 1334', 'role': 'assistant'}]