Task: Class Definition Understanding (ontology: Sciences/Biology)

Which of the following definitions best describes 'midline crest'?

A. The ventral area of the mouth. In organisms with a tongue, this is the area under the ventral surface of the tongue[ncit, modified].
B. The part of the face above the eyes[MESH]. In human anatomy, the the concept is the fore part of the head. It is, formally, an area of the head bounded by three features, two of the skull and one of the scalp. The top of the the concept is marked by the hairline, the edge of the area where hair on the scalp grows. The bottom of the the concept is marked by the supraorbital ridge, the bone feature of the skull above the eyes. The two sides of the the concept are marked by the temporal ridge, a bone feature that links the supraorbital ridge to the coronal suture line and beyond[WP].
C. A ridge or peak located along the middle part of the head, located approximately equidistant from the left and the right sides of the head.
D. A region of the forehead corresponding to the space between the eyebrows and above the nose.

Answer: A ridge or peak located along the middle part of the head, located approximately equidistant from the left and the right sides of the head.