**Core Concept**
The common peroneal nerve is a branch of the sciatic nerve that supplies the muscles of the lateral and anterior compartments of the leg, including the tibialis anterior, extensor hallucis longus, and peroneus longus and brevis. It provides motor innervation to the muscles responsible for dorsiflexion of the foot and toes.

**Why the Correct Answer is Right**
Loss of sensation over the sole is not typically associated with injury to the common peroneal nerve. This is because the common peroneal nerve primarily provides motor innervation to the muscles of the leg, whereas the sensation over the sole is mediated by the medial and lateral plantar nerves, which are branches of the posterior tibial nerve. The posterior tibial nerve is a separate entity from the common peroneal nerve and is responsible for sensation in the plantar surface of the foot.

**Why Each Wrong Option is Incorrect**
**Option B:** Foot drop is a classic symptom of injury to the common peroneal nerve, as it results in weakness or paralysis of the muscles responsible for dorsiflexion of the foot.
**Option C:** Injury to the neck of the fibula is a common mechanism of injury to the common peroneal nerve, as the nerve wraps around the lateral aspect of the fibula in this region.
**Option D:** Loss of dorsiflexion of the toe is also a characteristic symptom of injury to the common peroneal nerve, as the nerve supplies the muscles responsible for this movement.

**Clinical Pearl / High-Yield Fact**
The common peroneal nerve is often referred to as the "peroneal nerve" or "fibular nerve," but it is worth remembering that it is a branch of the sciatic nerve and is responsible for motor innervation to the muscles of the lateral and anterior compartments of the leg.

**Correct Answer:**
✓ Correct Answer: A. Loss of sensation over sole