An AP Atlas and Axis Projection with Accurate Positioning Demonstrates

Multiple Choice

An AP atlas and axis projection with accurate positioning demonstrates
1) the axis's spinous process aligned with its body midline.
2) an open atlantoaxial joint.
3) the upper incisors and posterior occiput superior to the dens.
4) the first through fourth cervical vertebrae.

A) 1 and 3 only
B) 2 only
C) 1, 2, and 3 only
D) 1, 2, 3, and 4