In which type of joint are two bones joined by cartilage?

Rationale:
A. Amphiarthroses are slightly movable joints where bones are connected by cartilage. Examples include the intervertebral discs (between vertebrae) and the pubic symphysis. These joints allow limited movement while providing strength and stability.
B. These are freely movable joints, also known as synovial joints (such as the knee, elbow, and shoulder). They are not primarily joined by cartilage but by a synovial cavity and ligaments.
C. These are immovable joints where bones are connected by fibrous tissue, such as the sutures of the skull. They do not involve cartilage.
D. A type of diarthrosis characterized by a synovial cavity filled with fluid, articular cartilage, and supporting ligaments, allowing free movement. They are not defined solely by cartilage connections.

Rationale:
A. This would mean closer to the body surface. The dermis is not superficial; rather, the epidermis is the most superficial layer of the skin.
B. This refers to being closer to the midline of the body. The term “medial” does not describe the relationship between the dermis and epidermis.
C. This refers to being away from the midline of the body. Like “medial,” it is not appropriate to describe the layers of the skin.
D. The dermis lies directly beneath the epidermis, making it deeper in position. It contains connective tissue, blood vessels, hair follicles, sebaceous glands, sweat glands, and sensory receptors that support and nourish the epidermis.