All of the following are parts of the mandible except:

The incisive fossa is not a part of the mandible, which makes it the correct answer. The mandible, or lower jawbone, is composed of various anatomical structures, including the condyle, coronoid process, and body.

The condyle is the rounded end of the mandible that articulates with the temporal bone of the skull at the temporomandibular joint (TMJ). The coronoid process is a flat, triangular projection that serves as the attachment point for the temporalis muscle, which is involved in chewing. The body of the mandible is the curved, horizontal portion that supports the lower teeth.

In contrast, the incisive fossa is actually a feature of the maxilla, or upper jawbone, located in the anterior region of the palate. Understanding the distinct anatomical features of the mandible versus the maxilla helps clarify why the incisive fossa is not part of the mandible.