STATEMENT 1: A solution has a solvent and a solute.
STATEMENT 2: The component of the solution that is dissolved in the solvent
(usually present in lesser quantity) is called solute.
STATEMENT 3: Particles of the solution can be seen with our naked eyes.
STATEMENT 4: Particles of the solution can be separated by the process of filtration.
Statement 1 and 2 are true.
The particles of a solution are smaller than 1nm hence cannot be seen with our naked eyes, the solute particles cannot be settled down if left undisturbed hence it cannot be filtered.