Which positioning problem(s) listed result(s) in an AP-PA chest projection (lateral decubitus po-sition) with the manubrium and the fifth thoracic vertebra located at the same level?
1. A patient rotated into an RPO position
2. An AP projection obtained with the upper midcoronal plane tilted away from the IR
3. A PA projection obtained with the upper midcoronal plane tilted toward the IR
4. An AP projection obtained with the central ray angled cephalically
a. 1 only
b. 2 only
c. 2 and 3 only
d. 2, 3, and 4 only
C
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