Which of the following is an example of a hinge joint?

A hinge joint is characterized by its ability to allow movement primarily in one direction, similar to the action of a door hinge. This type of joint permits flexion and extension, providing a mechanical advantage for movements that require bending and straightening.

The knee joint is a complex joint that functions like a hinge joint, allowing for significant flexion and extension, though it also has some rotational capabilities when flexed.

The interphalangeal joints, found between the phalanges of the fingers and toes, are classic examples of hinge joints, permitting flexion and extension while limiting movement in other directions.

The elbow is another illustration of a hinge joint. It allows for the bending (flexion) and straightening (extension) of the forearm relative to the upper arm.

Since all the listed joints—knee, interphalangeal, and elbow—exhibit the characteristics typical of hinge joints, the most accurate response is that all these options are examples of hinge joints.