73.20歲男性病人因車禍左髖關節腫痛。圖為本次就診之左髖關節X光攝影及電腦斷層影像。最可能的診斷為何？ (A)anterior hip fracture-dislocation(B)posterior hip fracture-dislocation(C)heterotopic ossification following dislocation(D)avascular necrosis of femoral head