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
The first line antileprosy drugs include all except? 
Select and explain. 
A. Dapsone, B. Thiacetazone, C. Clofazimine, D. Rifampicin
B: Thiacetazone
Answer: B: Thiacetazone 
Explanation: B. i.e. Thiacetazone