**Core Concept**
The lymphatic drainage of the anterior part of the nose is an essential aspect of understanding the regional anatomy and immunology of the nasal cavity. The anterior part of the nose, including the nasal vestibule, is drained by a specific group of lymph nodes that play a crucial role in filtering and responding to pathogens and allergens.

**Why the Correct Answer is Right**
The lymphatic drainage of the anterior part of the nose is primarily to the submandibular lymph nodes. This is because the lymphatic vessels of the nasal vestibule and anterior septum drain into the submandibular lymph nodes, which are located beneath the jaw. The submandibular lymph nodes are part of the cervical lymph node group and are responsible for filtering lymph from the anterior part of the nose, the oral cavity, and the anterior part of the face. The correct drainage of lymph from the anterior part of the nose is essential for preventing infection and promoting immune responses.

**Why Each Wrong Option is Incorrect**
**Option A:** The submental lymph nodes are primarily involved in the drainage of the oral cavity and the anterior part of the tongue, rather than the anterior part of the nose.
**Option B:** The parotid lymph nodes are involved in the drainage of the auricle and the external auditory canal, rather than the anterior part of the nose.
**Option C:** The occipital lymph nodes are involved in the drainage of the scalp and the posterior part of the head, rather than the anterior part of the nose.

**Clinical Pearl / High-Yield Fact**
The lymphatic drainage of the anterior part of the nose is an important consideration in the management of nasal infections and tumors, as it can affect the spread of disease to other parts of the head and neck.

**Correct Answer: D. Submandibular lymph nodes.**