You'd have to use 5 mL of 5 M sucrose and 95 mL of water.
A very useful tool to have when doind dilution calculations is the dilution factor - read more here:
The dilution factor will tell you by what factor you've diluted the original sample. In your case, you need to go from a concentration of 5 M to a concentration of 0.25 M.
You need the dilution factor to be equal to 20, since a molarity of 0.25 M is 20 times smaller than a molarity of 5 M.
The dilution factor is defined as the final volume of the solution divided by the initial volume of the sample
Check to see which of your solutions would give you a dilution factor of 20
This volume ratio is too high.
The volume ratio is till too high, move on to the next solution.
There it is. If you mix 5 mL of a 5-M sucrose solution with enough water to make the final volume equal to 100 mL (with 95 mL of water, to be precise), you'd get 100 mL of a 0.25-M solution. solution