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: Social & Preventive Medicine
The most rapidly bactericidal drug for M-Leprae is? 
Select and explain. 
A. Dapsone, B. Clofazimine, C. Ethionamide, D. Rifampicin
D: Rifampicin
Answer: D: Rifampicin 
Explanation: Ans. is 'd' i.e., Rifampicin o Rifampicin is the only drug that is highly bactericidal against M. leprae.