Antibacterial agents that can be given to adults at a dosing schedule of an oral formulation twice daily include?

The answer is 3 only, but no one got it. Details below :
Salmonellosis is a gastrointestinal tract infection caused by Salmonella species.
The quinolone ciprofloxacin or trimethoprim are the recommended antibacterial agents used in the management of salmonellosis

1

1 & 3

1

1 only

1, 2 and 3

1 only

1, 2 & 3

1 & 3