The correct option is B Pectoral girdle
Glenoid cavity is a shallow depression in the scapula into which head of the humerus articulates to form an important component of the pectoral girdle.
Pelvic girdle has a shallow depression into which the femur fits.
The skull is a bony structure that forms the head of the skeleton in most vertebrates.
The sternum or breastbone is a long flat bone shaped like a necktie located in the center of the chest.