Final answer:
The pelvis is not part of the axial skeleton. Rather, it's part of the appendicular skeleton which comprises the bones of the limbs and the pectoral and pelvic girdles.
Step-by-step explanation:
The axial skeleton is part of the skeletal system and it includes the bones that are located along the central axis of the body. These are: the skull, the rib cage, and the backbone or the vertebral column. Among the choices given above, the pelvis is not part of the axial skeleton. Instead, the pelvis is considered part of the appendicular skeleton, which includes the bones of the limbs and the pectoral and pelvic girdles.
Learn more about Axial Skeleton