21 下列何者會造成人股骨頭部缺血性壞死(avascular necrosis of the femoral head)?
(A)股骨粗隆間骨折(Intertrochanteric fracture)
(B)股骨頸部囊內骨折(Intracapsular femoral neck fracture)
(C)閉孔動脈(Obturator artery)發源處血栓(thrombosis)
(D)髖關節脫臼(Dislocation of the hip joint)併股骨圓韌帶撕裂(tear of ligamentum teres of the femur)