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 with an outstanding feature of being little or not affected by majority of inacti vating enzymes is- 
Select and explain. 
A. Gentamycin, B. Tobramycin, C. Amikacin, D. Sisomycin
C: Amikacin
Answer: C: Amikacin 
Explanation: Ans. is 'c' i.e., Amikacin Amikacin has widest spectrum of activity amongst aminoglycosides as it has resistance to bacterial aminoglycoside inactivating enzymes.