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: Skin
[{'content': 'The first line antileprosy drugs include all except? \nSelect and explain. \nA. Dapsone, B. Thiacetazone, C. Clofazimine, D. Rifampicin', 'role': 'user'}, {'content': 'Answer: B \nExplanation: B. i.e. Thiacetazone', 'role': 'assistant'}]