For an AP Oblique Lumbar Projection (RPO or LPO Position)

For an AP oblique lumbar projection (RPO or LPO position) , the
1) patient's thorax is rotated until the midcoronal plane is at a 45-degree angle with the IR.
2) side of interest is positioned closer to the IR.
3) central ray is centered 2 inches (5 cm) medial to the elevated ASIS at a level 1.5 inches (4 cm) superior to the iliac crest.
4) long axis of the vertebral column is aligned with the short axis of the collimated field.

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