This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Antibiotics, Subject name: Pharmacology
Most potent fluoroquinolone against Mycobacterium leprae is? 
Select and explain. 
A. Levofloxacin, B. Ofloxacin, C. Moxifloxacin, D. Ciprofloxacin
B: Ofloxacin
Answer: B: Ofloxacin 
Explanation: Ofloxacin when used as monotherapy in leprosy which kills 99% bacteria in 3 weeks.Ref: Sharma and Sharma 2nd e/pg 763