For a Submentovertex (SMV) Cranial Projection (Schueller Method), the

Multiple Choice

For a submentovertex (SMV) cranial projection (Schueller method) , the
1) central ray is aligned perpendicular to the IR.
2) central ray is centered to the midsagittal plane at a level 0.75 inch (2 cm) anterior to the level of the EAM.
3) IOML is parallel with the IR.
4) midsagittal plane is perpendicular to the IR.

A) 1 and 2 only
B) 3 and 4 only
C) 1, 3, and 4 only
D) 1, 2, 3, and 4