100. 多處髓鞘脫失 (demyelination)但軸索相對無恙的是: (A)中央橋腦髓燐脂溶解(central pontine myelinolysis) (B)肌萎縮性側索硬化(amyotrophic lateral sclerosis) (C)多發性硬化(multiple sclerosis) (D)脊髓亞急性合併變性(subacute combined sclerosis)