To determine the correct volume of saline solution, let's review the options provided:
- [tex]$200 mL$[/tex]
- [tex]$400 mL$[/tex]
- [tex]$300 mL$[/tex]
- [tex]$500 mL$[/tex]
The correct volume of the saline solution, as we know, is 500 milliliters.
Therefore, based on the options provided, the correct answer is [tex]$500 mL$[/tex].