Which of the following is NOT an unpaired facial bone?

The nasal bone is correctly identified as a paired facial bone, which means that there are two nasal bones, one on each side of the nose. In contrast, the vomer and the mandible are examples of unpaired facial bones. The vomer forms part of the nasal septum and is situated in the midline of the skull, while the mandible is the lower jawbone and is also unpaired as it forms the entire lower jaw. The lacrimal bones, although small, are also paired, one located in each inner corner of the eye socket. Understanding the distinctions between paired and unpaired facial bones is crucial for fields like anatomy, dentistry, and other health professions that require knowledge of the human skeletal system.