When Using a 35 × 43 Cm IR,where Should the CR

When using a 35 × 43 cm IR,where should the CR enter the patient for an AP projection of the lumbar spine?

A) At the level of the iliac crest in the midline of the patient
B) At a level 1 $\frac{1}{2}$ inches superior to the iliac crest in the midline of the patient
C) At the level of the sacrum along the coronal plane of the patient
D) This size IR is not appropriate for lumbar spine images