Concept:Distillation separates a liquid solvent from a dissolved solute by boiling and condensing the solvent.
Explanation:A solution consists of a solute dissolved in a solvent.
To obtain the solvent itself, you need a method that collects the liquid after separation.
Evaporation only removes the solvent as vapour and leaves the solute behind, so the solvent is lost.
Distillation is the correct technique because it heats the solution and then cools and collects the vapour as pure solvent.
Filtration is used for separating an insoluble solid from a liquid, not for a solution.
Precipitation involves forming a solid from a solution, which does not recover the solvent.
Therefore, distillation allows the solvent to be recovered in its pure liquid form.
Answer:B. Distillation.