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': 'An aminoglycoside that is resistant to majority of inactivating enzymes is : \nSelect and explain. \nA. Gentamicin, B. Amikacin, C. Tobramycin, D. Sisomicin', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]