For a PA cranial projection,

1. the midsagittal plane is positioned parallel with the IR.
2. the OML is aligned perpendicular to the IR.
3. the central ray is aligned perpendicular to the IR.
4. the central ray is centered to the nasion.
a. 1 and 3 only
b. 2 and 3 only
c. 2, 3, and 4 only
d. 1 and 4 only

B

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Indicate whether the statement is true or false

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