Question

a young child falls off their bike and lands on their hand, breaking the media their antebrachium. which bone did they break?
carpal
metacarpal
humerus
radius
ulna

Explanation:

The antebrachium is the forearm. The two bones of the forearm are the radius and ulna. The radius is the lateral (thumb - side) bone and the ulna is the medial (pinky - side) bone. Since the question mentions the medial side of the antebrachium, the broken bone is the ulna. Carpals are wrist bones, metacarpals are hand bones, and the humerus is the upper - arm bone.

Answer:

Ulna