Which of the following muscles extends the forearm and has its insertion on the ulna?

A) Deltoid
B) Biceps brachii
C) Triceps brachii
D) Brachialis
E) Coracobrachialis

Triceps Brachii

A major muscle of the upper arm responsible for extension of the forearm at the elbow joint.

Forearm

The region of the arm between the elbow and the wrist, consisting of two bones (radius and ulna) and various muscles, nerves, and blood vessels.

Ulna

One of the two long bones in the forearm, extending from the elbow to the smallest finger, and playing a role in arm movement and stability.