**Core Concept**
The parotid gland is a major salivary gland located in the preauricular region, playing a crucial role in salivation and digestion. It is situated anterior to the ear and contains multiple nerves and blood vessels that pass through it.

**Why the Correct Answer is Right**
The parotid gland is a complex structure that contains several important nerves and blood vessels. The facial nerve (cranial nerve VII) is a key structure that passes through the parotid gland, as it is surrounded by the gland and exits through the stylomastoid foramen. Additionally, the external carotid artery and its branches, including the maxillary artery, also pass through the parotid gland. These structures are essential for the gland's function and innervation.

**Why Each Wrong Option is Incorrect**
**Option A:** The auriculotemporal nerve, a branch of the mandibular division of the trigeminal nerve (cranial nerve V3), actually passes through the parotid gland and is closely associated with the gland's innervation. It is not an exception.
**Option B:** The retromandibular vein, a key venous structure in the parotid gland, is formed by the junction of the maxillary and superficial temporal veins within the gland. It is indeed passing through the gland.
**Option C:** The external carotid artery, which passes through the parotid gland, gives off several important branches, including the maxillary artery, that supply the gland and surrounding structures. This is not an exception.

**Clinical Pearl / High-Yield Fact**
Remember the "5 P's" of the parotid gland: **P** reauricular location, **P** arotid duct (Stensen's duct), **P** arotid gland itself, **P** arrector pili muscles (in the gland), and **P** arasympathetic innervation (via the auriculotemporal nerve). These structures are all crucial for the gland's function and should be remembered for the exam.

**Correct Answer:** D