<u>Answer:</u> The correct answer is Option D.
<u>Explanation:</u>
From the given options:
<u>Option A:</u> Unsaturated solution is defined as the solution in which more solute particles can be dissolved in the solvent.
<u>Option B: </u>Saturated solution is defined as the solution in which no more solute particles can be dissolved in the solvent.
<u>Option C:</u> Supersaturated solution is defined as the solution in which more amount of solute particles is present than the solvent particles.
<u>Option D:</u> Oversaturated is defined as the to saturate the solution excessively or to provide with more amount of substance for saturation.
Hence, the correct answer is Option D.