## Core Concept
Inversion injuries at the ankle are common and typically result from the foot rolling inward, causing stress and potential damage to the structures on the lateral (outer) side of the ankle. The primary concern with inversion injuries is the potential damage to the lateral ankle ligaments and, less commonly, to the medial (inner) structures due to the sudden forced inversion.

## Why the Correct Answer is Right
The correct answer involves understanding the typical injuries associated with an inversion injury at the ankle. Common injuries include:
- **Anterior talofibular ligament (ATFL) injury**: This is the most commonly injured ligament in ankle inversion injuries.
- **Calcaneofibular ligament injury**: This ligament can also be injured in more severe inversion injuries.
- **Posterior talofibular ligament (PTFL) injury**: Though less common, it can be injured in severe cases.

## Why Each Wrong Option is Incorrect
- **Option A:** Typically, inversion injuries can cause fractures of the lateral malleolus (a part of the fibula) due to the avulsion of bone where the ligaments attach. So, this option would usually be a consequence of an inversion injury.
- **Option B:** The **deltoid ligament**, which is on the medial side of the ankle, can be injured in eversion injuries rather than inversion. However, severe inversion can sometimes cause a medial fracture or a fracture of the medial malleolus due to the talus being pushed against it. The statement might seem incorrect at first glance but could relate to the mechanism of injury in a nuanced way.
- **Option C:** **Peroneal tendon** injuries or issues can occur due to inversion injuries as the peroneal tendons are located on the lateral side of the ankle and can be strained or injured during such an event.
- **Option D:** **Peroneal nerve** injury is not commonly associated directly with inversion injuries. The peroneal nerve wraps around the lateral aspect of the fibular neck and is more commonly injured in direct blows to this area or in fractures of the fibular neck.

## Clinical Pearl / High-Yield Fact
A key point to remember is that while inversion injuries commonly affect the lateral ankle ligaments, certain injuries like those to the **deltoid ligament** are more typical of eversion injuries. The **peroneal nerve**, being more proximal and not directly associated with the ankle joint's ligamentous structure, is less likely to be injured in a typical inversion injury.

## Correct Answer Line
**Correct Answer: D. Peroneal nerve.**