Your sister fell and landed on her right arm. She complains of right arm pain and an inability to move her elbow. An x-ray reveals that the elbow has been dislocated. What bones and bone structures, specifically, have dislocated from each other in this injury?

The trochlea of the (pick one {trochlea, sternum, radius, humerus, carpals, ulna, clavicle, rib}) has been dislocated from the trochlear notch of the (pick one {trochlea, sternum, radius, humerus, carpals, ulna, clavicle, rib}).

Can you please provide me with an explanation of this ASAP