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Published on Feb 27, 2021
MCQ !
MCQ !

A neonate with TORCH syndrome develops respiratory insufficiency and expires. A lobule of the thymus is examined at autopsy (shown in the image). What crucial T-cell maturation step takes place within the region indicated by the circle? 

  1. (A)  Negative selection for foreign antigen recognition

  2. (B)  Negative selection for MHC recognition

  3. (C)  Negative selection for self-antigen recognition

  4. (D)  Positive selection for foreign antigen recognition 


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