Option C is correct. The radius articulates proximally at the elbow with the capitulum of the humerus and the radial notch of the ulna. It articulates at its distal end with the ulna at the ulnar notch and with the articular surfaces of the scaphoid and lunate carpal bones.
It has three bones, the collarbone (clavicle), scapula, and humerus. Humerus gives attachment to muscular tissues of the upper arm. Scapula is the bone that connects the higher arm bone with the collarbone. It is a flat bone and roughly triangular in shape and affords attachment to the muscle tissues of again and neck.
The glenoid fossa of the scapula articulates with the head of the humerus to shape the glenohumeral joint.
Learn more about humerus here:
