For a Left Lateral Chest Projection with Accurate Positioning, the

Multiple Choice

For a left lateral chest projection with accurate positioning, the
1) SID is set at 40 inches (102 cm) .
2) humeri are positioned vertically.
3) shoulders, posterior ribs, and posterior pelvic wings are aligned perpendicular to the image receptor (IR) .
4) midsagittal plane is aligned perpendicular to the IR.

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