**Core Concept**
The "VAN" arrangement, also known as the "vein, artery, nerve" arrangement, refers to the anatomical relationship between the accompanying blood vessels and nerves in the limbs. This arrangement is crucial in understanding the pattern of nerve injury in limb trauma and surgical procedures.

**Why the Correct Answer is Right**
The correct arrangement is typically vein, artery, nerve (VAN). This order is based on the anatomical structure and the pattern of branching of these vessels and nerves. The veins are usually located in the superficial layer, followed by the arteries, and then the nerves. This order is essential in preventing nerve damage during surgical procedures, such as vascular surgery, and in diagnosing nerve injuries in traumatic cases.

**Why Each Wrong Option is Incorrect**
**Option A:** The reverse order of nerve, artery, vein (NAV) is incorrect because it does not accurately reflect the anatomical relationship between these structures.
**Option B:** The order of artery, vein, nerve (AVN) is incorrect because it misrepresents the typical arrangement of these vessels and nerves.
**Option C:** The order of nerve, vein, artery (NVA) is incorrect because it does not follow the established anatomical pattern.

**Clinical Pearl / High-Yield Fact**
When performing surgical procedures or assessing limb trauma, it is essential to remember the VAN arrangement to prevent nerve damage and ensure accurate diagnosis. This knowledge can also aid in the selection of the correct surgical approach.

**Correct Answer:** D. Vein, artery, nerve (VAN)