Where Does the Central Ray Enter the Patient for an AP

Multiple Choice

Where does the central ray enter the patient for an AP hip?

A) The midsagittal plane (MSP) at the level of the ASIS
B) A sagittal plane 2 inches lateral from MSP at the level of the pubic symphysis
C) 2 inches distal on a line drawn perpendicular to the midpoint of a line between ASIS and pubic symphysis
D) A sagittal plane 3 inches medial to the ASIS