What is the name of the U-shaped bone located superior to the larynx

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. Ulna is one of the two long bones in the forearm, located on the side opposite the thumb, and is not part of the thigh.
B. Tibia is the larger of the two bones in the lower leg (shinbone) and supports the weight of the body, but it is not in the thigh.
C. Tibia is the longest and strongest bone in the human body, extending from the hip to the knee. The femur supports the weight of the body during standing, walking, and running, and its proximal end forms part of the hip joint while the distal end forms part of the knee joint. Its strength and structure are essential for locomotion and maintaining upright posture.
D. Humerus is the long bone of the upper arm, connecting the shoulder to the elbow, and is unrelated to the thigh.