Ans: A. AmikacinRef: Sharma & Sharma's Principles of Pharmacologt, 3d ed., pg. 74t-749 and htrys://www.uplodate.com/contents/treatment-and-prevention-of-enteric-typhoid-und-paratyphoid-feverAmikacin is a commonly used aminoglycoside.Antimicrobial spectrum of aminoglycosides does not include salmonella.It is used in gentamycin and tobramycin resistant infections.It is used for organisms like Pseudomonas, Proteus, and Serratia. It is also effective in MDR-TB.