## Core Concept
The occipital cortex, responsible for processing visual information, receives its blood supply from specific arteries that branch off from the major cerebral arteries. Understanding the arterial supply to different parts of the brain is crucial for diagnosing and managing neurological conditions.

## Why the Correct Answer is Right
The correct answer, **Posterior Cerebral Artery (PCA)**, is right because the PCA is one of the three main cerebral arteries and is primarily responsible for supplying blood to the occipital lobe, which houses the visual cortex. The PCA arises from the basilar artery, which is formed by the fusion of the two vertebral arteries. The PCA supplies not only the occipital cortex but also parts of the temporal lobe and the thalamus.

## Why Each Wrong Option is Incorrect
- **Option A:** The **Anterior Cerebral Artery (ACA)** primarily supplies the medial surface of the frontal and parietal lobes. It is not the primary artery supplying the occipital cortex.
- **Option B:** The **Middle Cerebral Artery (MCA)** is the largest cerebral artery and supplies a significant portion of the lateral surface of the brain, including parts of the frontal, parietal, and temporal lobes, but it does not primarily supply the occipital cortex.
- **Option D:** While the **Anterior Choroidal Artery** does supply parts of the temporal lobe and is a branch of the internal carotid artery, it is not the primary artery responsible for supplying the occipital cortex.

## Clinical Pearl / High-Yield Fact
A key clinical correlation to remember is that occlusion of the **Posterior Cerebral Artery (PCA)** can lead to visual field defects, including homonymous hemianopia, due to its critical role in supplying the occipital lobe. This is a high-yield fact for neurology and ophthalmology, especially in the context of stroke and vascular neurology.

## Correct Answer: C. Posterior Cerebral Artery.