## Core Concept
Competitive reversible antagonism is a type of receptor antagonism where the antagonist competes with the agonist for binding to the receptor, but does not activate it. This type of antagonism is reversible, meaning that the antagonist can dissociate from the receptor, allowing the agonist to bind.

## Why the Correct Answer is Right
In competitive reversible antagonism, the presence of the antagonist increases the **apparent Km** (Michaelis constant) of the agonist for the receptor, but does not affect the **Vmax** (maximum velocity) of the agonist-receptor interaction. This is because the antagonist and agonist are competing for the same binding site on the receptor, but the antagonist does not change the maximum response that can be achieved by the agonist.

## Why Each Wrong Option is Incorrect
* **Option A:** This option is incorrect because competitive reversible antagonism does not change the Vmax of the agonist-receptor interaction.
* **Option B:** This option is incorrect because, although it mentions Km, it does not accurately describe the effect of competitive reversible antagonism on Km and Vmax.
* **Option D:** This option is incorrect because it likely describes a different type of antagonism or pharmacological effect.

## Clinical Pearl / High-Yield Fact
A key point to remember is that the effect of a competitive reversible antagonist can be overcome by increasing the concentration of the agonist, which can outcompete the antagonist for receptor binding. This is a fundamental concept in pharmacology and can be relevant in clinical situations where dose adjustments are needed.

## Correct Answer Line
**Correct Answer: C.**