An AP Chest Projection (Lateral Decubitus Position) Obtained with the Patient

An AP chest projection (lateral decubitus position) obtained with the patient in an RPO position demonstrates
1) the right SC joint without vertebral column superimposition.
2) 9 or 10 posterior ribs above the diaphragm.
3) the manubrium superimposed over the fifth thoracic vertebra.
4) the left posterior ribs with greater length than the right posterior ribs.

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