An AP scapular projection with accurate positioning demonstrates
1. almost superimposed anterior and posterior glenoid fossa margins.
2. the vertebral scapular border without thoracic cavity superimposition.
3. the humeral shaft at a 90-degree angle with the body.
4. the supraspinatus fossa and superior scapular angle without clavicular superimposition.
a. 1 and 3 only
b. 1, 3, and 4 only
c. 1 and 2 only
d. 3 and 4 only
B
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