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 often combined with
polymyxin and bacitracin for the treatment of
topical infection is 
Select and explain. 
A. Gentamycin, B. Tetracycline, C. Aztreonam, D. Neomycin
D: Neomycin
Answer: D: Neomycin 
Explanation: None