1.慢性腎臟病(chronic kidney disease, CKD)的病人，會發生骨病變(osteodystrophy)，以下機轉敘述，何者正確? (應選出所有正確答案) (1)1,25-vitamin D3 deficiency (2)Hypophosphatemia (3)Hypocalcemia (4)Low serum FGF-23 (fibroblast growth factor-23) (5)Klotho deficiency
(A)(1)+(2)+(3)+(4)
(B)(2)+(4)+(5)
(C)(1)+(3)+(5)
(D)(1)+(3)+(4)+(5)
(E)(1)+(3)+(4)