**Core Concept**
The question requires knowledge of the pharmacokinetics of poison elimination, specifically the role of dialysis in removing toxins from the body. Dialyzability refers to the ability of a poison to be removed from the bloodstream using dialysis, which is a medical treatment that uses a machine to filter the blood.

**Why the Correct Answer is Right**
Dialysis is an effective method for removing water-soluble substances, such as certain medications and toxins, from the bloodstream. The effectiveness of dialysis in removing a poison depends on its molecular weight, lipid solubility, and protein binding. Poisons that are highly protein-bound or lipid-soluble are less likely to be dialyzable.

**Why Each Wrong Option is Incorrect**
* **Option A:** This poison is a highly charged molecule, making it dialyzable.
* **Option B:** This poison is a large molecule that is not easily filtered by dialysis.
* **Option C:** This poison is highly protein-bound, reducing its availability for dialysis.

**Clinical Pearl / High-Yield Fact**
When considering the use of dialysis to remove a poison, it is essential to assess the poison's pharmacokinetic properties, including its molecular weight, lipid solubility, and protein binding.

**Correct Answer:** A.