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
An aminoglycoside that is resistant to majority of inactivating enzymes is : 
Select and explain. 
A. Gentamicin, B. Amikacin, C. Tobramycin, D. Sisomicin
B: Amikacin
Answer: B: Amikacin 
Explanation: None