Which one of the following statements is true?
1
Head of humerus bone articulates with acetabulum of pectoral girdle.
2
Head of humerus bone articulates with the glenoid cavity of pectoral girdle.
3
Head of humerus bone articulates with acetabulum of pelvic girdle.
4
Head of humerus bone articulates with a glenoid cavity of pelvic girdle.