This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Chemotherapy, Subject name: Pharmacology
Which one of the following drugs is not used in the treatment of mycobacterium avium intercellular infection cla 
Select and explain. 
A. Claruthromycin, B. Eflornithine, C. Ethambutol, D. Rifabutin
B: Eflornithine
Answer: B: Eflornithine 
Explanation: Refer KDT 6/e p750. Eflornithine is used for the treatment of some cases big trypanomiasis. It is also used topically in women to delay regrowth of facial hair following depilation