[单选题]
有关正常人血液中IgG亚类浓度的说法正确的是
A.IgG
>IgG
>IgG
>IgG
B.IgG
>IgG
>IgG
>IgG
C.IgG
>IgG
>IgG
>IgG
D.IgG
>IgG
>IgG
>IgG
E.IgG
>IgG
>IgG
>IgG
参考答案与解析: