下列構造，何者將坐骨大和小切迹(greater and lesser sciatic notches)分隔成坐骨大和小孔(foramina)？
骶棘韌帶(sacrospinous ligament)
骶尾韌帶(sacrococcygel ligament)
骶髂韌帶(sacroiliac ligament)
骶髂骨間韌帶(interosseous sacroiliac ligament)
