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
Patients suffering from multidrug resistant tuberculosis can be treated with all the following drugs except 
Select and explain. 
A. Tobramycin, B. Amikacin, C. Ciprofloxacin, D. Claruthromycin
A: Tobramycin
Answer: A: Tobramycin 
Explanation: Refer KDT 6/e p 748 Aminoglycosides effective in MDR tuberculosis are Amikacin, kanamycin, capreomycin Tobramycin is not effective against mycobacterium Ciprofloxacin and Clarithromycin are also used for tuberculosis