Which of the following bones are considered to be the MOST proximal? metatarsals
clavicle
ulna
olecranon

Of the group of bones mentioned, the most proximal is the clavicle, which is part of the shoulder girdle.

Explanation:

Proximal is a reference term used in anatomy to indicate the structures that are closest to the center of the body.

The bones mentioned -clavicle, olecranon, ulna and metatarsals- are related to the function of the limbs. The clavicle is the closest bone to them, located between the neck and the thorax, on each side of the midline of the body.

Regarding the other options, other bones are distal, as they move away from the center of the body. In order from less distal to more distal they are found: