19. Which one of the following defects impairs T cell development but NOT B cell development?
(A) ADA deficiency
(B) Btk deficiency
(C) NFAT deficiency
(D) RAG deficiency
(E) TAP-1 deficiency.
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統計: A(0), B(1), C(0), D(0), E(0) #3207880
統計: A(0), B(1), C(0), D(0), E(0) #3207880