## Core Concept
The posterior cerebral artery (PCA) is a critical structure in the brain, supplying blood to the occipital lobe, the medial and lateral aspects of the temporal lobe, and various deep structures. Embolism in the PCA can lead to specific neurological deficits depending on the area affected. Memory deficits are commonly associated with damage to structures within the temporal lobe.

## Why the Correct Answer is Right
The correct answer involves the area responsible for memory, which is primarily associated with the temporal lobe, particularly the hippocampus and surrounding structures. The PCA supplies parts of the temporal lobe, including the medial temporal lobe, which is crucial for memory formation. Therefore, an embolism in the PCA can lead to memory deficits by affecting these areas.

## Why Each Wrong Option is Incorrect
- **Option A:** This option is incorrect because it does not specify an area that, when affected by PCA embolism, would primarily result in memory deficits. Without specific anatomical reference, it's hard to directly refute, but typically, memory deficits are linked to temporal lobe structures.
- **Option B:** This option might refer to areas supplied by other cerebral arteries or less directly linked to memory functions. The PCA's territory includes parts of the temporal lobe crucial for memory, making areas outside this context less likely to be correct.
- **Option C:** While not directly addressed, if this option refers to areas not primarily supplied by the PCA or not directly implicated in memory, it would be incorrect.

## Clinical Pearl / High-Yield Fact
A key clinical correlation to remember is that **PCA infarcts** can cause **memory impairments** due to involvement of the **temporal lobe**, particularly if the **hippocampus** and **uncus** are affected. This is a high-yield fact because it connects a specific vascular event (PCA embolism) with a recognizable clinical syndrome (memory deficit), which can be critical for neurology and vascular neurology board questions.

## Correct Answer: C.