This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bacterial infections, Subject name: Dental
Which of the following is not approved for treatment of leprosy 
Select and explain. 
A. Ofloxacin, B. Minocycline, C. Azathioprine, D. Clarithromycin
C: Azathioprine
Answer: C: Azathioprine 
Explanation: Ref Harrison20th edition pg 1334