**Core Concept**
The nasolacrimal duct is a critical structure in the drainage system of the eye, responsible for conveying tears from the lacrimal sac to the nasal cavity. The opening of the nasolacrimal duct is a specific anatomical location where this drainage occurs.

**Why the Correct Answer is Right**
The nasolacrimal duct opens into the inferior meatus of the nasal cavity, which is the lowermost part of the nasal passage. This location allows for the proper drainage of tears and mucous from the eye into the nasal cavity, where they can be expelled through nasal breathing or sneezing. The opening of the nasolacrimal duct is a small, slit-like structure that can be visualized during nasal endoscopy or CT scans of the head and neck.

**Why Each Wrong Option is Incorrect**
**Option A:** The opening of the nasolacrimal duct is not located in the middle meatus of the nasal cavity, which is a different drainage pathway for the anterior ethmoidal sinuses.
**Option B:** The opening of the nasolacrimal duct is not located in the superior meatus of the nasal cavity, which is a drainage pathway for the posterior ethmoidal sinuses.
**Option C:** The opening of the nasolacrimal duct is not located in the nasopharynx, which is a separate anatomical region that receives drainage from the Eustachian tubes and adenoids.

**Clinical Pearl / High-Yield Fact**
Remember that the nasolacrimal duct is a common site for congenital anomalies, such as nasolacrimal duct obstruction, which can cause epiphora (excessive tearing) and other symptoms.

**Correct Answer:** C. The opening of the nasolacrimal duct is situated in the inferior meatus of the nasal cavity.