Identify the incorrect pair. amphiarthrosis; slightly movable joint synarthrosis; immovable joint gomphosis; articulation between tooth and bone chondrosis; freely moving joint They are all correct; there is no incorrect pair

The correct answer is option - chondrosis: freely moving joint.

Explanation:

Chondroitin is the condition, not a joint which is basically is the loss or softness of the smooth cartilage that covers the joint of the knee at the back of the kneecap. This condition occurs due to prior injury, overweight or obesity, and a more common cause is an acceleration of the cartilage abnormally at the kneecap.

It is also known as cartilage deterioration which is joint effusion. All three joints are correctly matched. amphiarthrosis is a slightly movable joint, synarthrosis is an immovable joint, and gomphosis is a joint that articulation between tooth and bone.

Thus, the correct answer is option - chondrosis: freely moving joint.