The sutures of the skull are the best examples of:i. cartilaginous jointsii. synovial jointsiii. fibrous jointsiv. freely movable joints

The sutures of the skull are the best examples of fibrous joints.

Here's why:

i. Cartilaginous joints: These are joints that are connected entirely by cartilage (for example, the joints between the ribs and the sternum). The sutures of the skull are not connected by cartilage, so this option is incorrect.

ii. Synovial joints: These are the most common and most movable type of joint in the body of a mammal. As the sutures of the skull are not movable, this option is incorrect.

iii. Fibrous joints: These are connected by fibrous tissue. The sutures of the skull are a type of fibrous joint, as they are immovable and connected by a dense fibrous connective tissue. So, this option is correct.

iv. Freely movable joints: As mentioned above, the sutures of the skull are immovable, so this option is incorrect.