47.牙齒延遲萌發和下列何項系統性疾病最不相關?(A)嘉德耐氏症候群(Gardner syndrome)(B)鎖骨顱骨發育不全(cleidocranial dysplasia hypoplasia)(C)甲狀腺功能亢進(hyperthyroidism)(D)低磷酸血症(hypophosphatemia)