Assertion: A saturated solution may be quite dilute. 

Reason: Some substances have very low solubility. 

We must first comprehend the idea of a saturated solution in order to answer this issue. Only after evaluating the solution's characteristics and the cause of its saturation can we get to the correct conclusion.

Before we proceed with the answer to this question, let's first grasp some fundamental ideas:
Saturated Solution: At a specific temperature, a saturated solution is a liquid that contains the most solute that can be dissolved in a given amount of solvent.
Step1: Consider a water-salt solution that is only sporadically soluble. In such a solution, no further solute can be dissolved. It is a saturated solution as a result. Additionally, the solute concentration is quite low compared to the solvent concentration. The solution is therefore diluted.

Step 2: As a result, even when very little salt is dissolved in water, the sparingly soluble salts create a saturated solution. As a result, a diluted solution might also be saturated. Therefore, the claim is true.
Since the words "diluted" and "concentrated" only refer to the proportion of the solute that has been dissolved in the solvent, Significantly more solute is present in concentrated solution than in diluted solution. The reason is so valid.

Hence the correct answer is option A.