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
[{'content': 'Patients suffering from multidrug resistant tuberculosis can be treated with all the following drugs except \nSelect and explain. \nA. Tobramycin, B. Amikacin, C. Ciprofloxacin, D. Claruthromycin', 'role': 'user'}, {'content': 'Answer: A \nExplanation: 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', 'role': 'assistant'}]