Which of the following are bones of the forearm?

The bones of the forearm are specifically the radius and the ulna. The forearm is the region between the elbow and the wrist, and it consists of these two long bones that run parallel to each other. The radius is located on the lateral side (the thumb side) when the palm is facing forward, while the ulna is on the medial side (the side of the little finger).

This distinction is important not only for anatomical understanding but also for various medical and radiological practices, including when interpreting x-rays, as the position and condition of these bones can greatly affect the diagnosis and treatment of injuries.

The other options listed refer to bones located in different areas of the arm or hand. The humerus is the bone of the upper arm, while the metacarpals are the bones of the hand. Similarly, the phalanges are the finger bones, and carpals are the wrist bones. Each group serves its unique function and contributes to overall arm and hand functionality, but they do not classify under the forearm bones. Therefore, the radius and ulna are the correct and only bones that constitute the forearm.