This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pharmacology
[{'content': 'Patients suffering from multidrug resistant tuberculosis can be treated with all the following durgs except - \nSelect and explain. \nA. Tobramycin, B. Amikacin, C. Ciprofoxacin, D. Clarithromycin', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Tobramycin Tobramycin is not an antitubercular aminoglycoside.", 'role': 'assistant'}]