Which bony landmark of the ulna is palpated at the distal end?

The correct answer is the styloid process, which is located at the distal end of the ulna. This structure is a small, pointed projection that can be easily felt beneath the skin on the medial side of the wrist. It serves as an important landmark for anatomical orientation and is involved in the attachment of ligaments that stabilize the wrist joint.

The olecranon process, located at the proximal end of the ulna, forms the bony prominence of the elbow and is not found at the distal end. The coronoid process, also located at the proximal end of the ulna, plays a role in the hinge joint of the elbow and is situated above the ulnar notch, contributing to the stabilization of the joint. The ulnar notch itself is part of the radius and facilitates articulation with the ulna, but it is not a bony landmark of the ulna that can be palpated at the distal end. Therefore, the styloid process represents the correct anatomical structure one would palpate at the distal end of the ulna.