A Radiograph of an Anteroposterior (AP) Axial Projection of the Cranium

Multiple Choice

A radiograph of an anteroposterior (AP) axial projection of the cranium reveals that the dorsum sellae is projected below the foramen magnum, but the posterior arch of C1 is visible within the foramen.Which of the following positioning errors led to this radiographic outcome?

A) Excessive central ray (CR) angulation
B) Insufficient CR angulation
C) Insufficient flexion of the head and neck
D) Tilt of the skull