Concept:A saturated solution is one where no more solute can dissolve at a given temperature.
Explanation:When a solute is added to a solvent, it dissolves until the solvent can hold no more solute.
At that stage, an equilibrium is established between the dissolved solute and the undissolved solute.
The rate at which solute dissolves becomes equal to the rate at which dissolved solute crystallises out.
Because these two opposing processes occur at the same rate, the concentration of dissolved solute stays constant.
The solution now contains the maximum possible amount of solute that can dissolve under those conditions.
This type of solution is specifically called a saturated solution.
An unsaturated solution can still dissolve additional solute.
Concentrated and diluted are relative terms that describe the amount of solute present, not this equilibrium condition.
Answer:A. Saturated