71.下列那一項診斷屬於斯布蘭格形態學分類法(Spranger's classification of morphogenesis)的發育不全 (dysplasia)？ (A)骨脆弱症(osteogenesis imperfecta) (B)髖關節發育不全(developmental dysplasia of the hip) (C)先天性多關節硬化症(arthrogryposis multiplex congenita) (D)幼年期風濕性關節炎(juvenile rheumatoid arthritis)