An AP cranial projection can be distinguished from a PA cranial projection because it demon-strates
1. less orbital magnification.
2. the internal auditory canals horizontally through the orbits.
3. less distance from the lateral orbital margins to the lateral cranial cortices.
4. the anterior clinoids and dorsum sellae superior to the ethmoid sinuses.
a. 1 only
b. 1 and 3 only
c. 3 only
d. 2, 3, and 4 only
C
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