Final answer:
The true statement about articulations is that the wrist joint is classified as a synovial joint, characterized by its synovial cavity filled with synovial fluid and enclosed by a membrane (option c).
Step-by-step explanation:
The question pertains to the characteristics and classification of articulations, specifically synovial joints. Among the choices provided, the statement which is true regarding articulations is that the wrist joint is classified as a synovial joint. Synovial joints are characterized by a fluid-filled space, known as the synovial cavity, between the bones that form the joint. This cavity is enclosed by a membrane and filled with synovial fluid for cushioning. The knee is also a synovial joint but is not the topic of the correct statement.
The false statements provided include: a) The cartilage found between two vertebrae is actually hyaline cartilage, not elastic cartilage. b) While the knee joint does have multiple ligaments that stabilize it, specifying 'six' is unnecessary for the choice to be true, and the focus should be on the fact that it is a synovial joint.
Hence, the answer is option c.