When examining a patient whose elbow is in partial flexion,…

When exаmining а pаtient whоse elbоw is in partial flexiоn, how should the AP projection be obtained?      1. With humerus parallel to film, centering to the elbow joint      2.  With forearm parallel to film, centering to the elbow joint      3.  Through the partially flexed elbow, resting on olecranon process