An AP elbow projection obtained with the elbow internally rotated demonstrates
1. the radial tuberosity in profile.
2. an open capitulum–radial joint space.
3. more than 0.25 inch (0.6 cm) of radial head and ulnar superimposition.
4. less than 0.25 inch (0.6 cm) of radial head and ulnar superimposition.
a. 1 and 3 only
b. 2 and 3 only
c. 2 and 4 only
d. 1, 2, and 3 only
B
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