**Core Concept**
The nasion is a significant anatomical landmark in the skull, representing the junction of the frontal bone and the two nasal bones. It serves as a crucial reference point in cephalometric analysis and radiographic assessments.

**Why the Correct Answer is Right**
The nasion is specifically located at the intersection of the intranasal suture, which is the line where the two nasal bones meet, and the frontonasal suture, which is the line where the nasal bones meet the frontal bone. This precise location allows for accurate measurement and analysis of the craniofacial complex.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not specify the precise anatomical location of the nasion. The junction of the nasal bones alone does not accurately define the nasion.
**Option B:** This option is also incorrect because the nasion is not located at the intersection of the nasal bones and the maxillary bone. The maxillary bone forms the upper jaw and does not contribute to the definition of the nasion.

**Clinical Pearl / High-Yield Fact**
The nasion serves as a critical landmark in various medical and dental specialties, including orthodontics, oral surgery, and maxillofacial surgery. Accurate identification and measurement of the nasion are essential for diagnosing and treating craniofacial abnormalities.

**Correct Answer:** D.