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 most effective drug against M. leprae is: 
Select and explain. 
A. Dapsone, B. Rifampicin, C. Clofazamine, D. Prothionamide
B: Rifampicin
Answer: B: Rifampicin 
Explanation: B ie Rifampcin