Standard radiographic protocols may be reduced to include two views, at right angles to each other, in which of the following situations? a barium examinationsb spine radiographyc skull radiographyd emergency and trauma radiography

A: no  

In barium examinations, you want to see if something it's obstructing, like the colon. You only use a front view.

B: yes

When you want to see if everything it's alright about the spine, you need to analyze the curvature, and for that, you need front and side view.

And, is the only radiographic tool that can be done in antero-posterior and lateral views.

C: no

When you are looking for trauma or bone breakage, you may need only a side view or front view.

D: yes

If you are looking for any trauma or emergency, you need different positions of the bone to discover any breakage.

it is either c or d and i know for sure it is not a or b