Which of the following is $NOT$ associated with the bone marrow?

  • A
    It is the primary lymphoid organ.
  • B
    All blood cells are produced here.
  • C
    Lymphocytes mature here.
  • D
    It provides a site for lymphocytes to interact with antigens.

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Match the following barriers of innate immunity with their respective examples and select the correct option:
List-$I$ (Barrier)List-$II$ (Example)
$A$. Physical barrier$i$. Skin
$B$. Physiological barrier$ii$. Interferons
$C$. Cellular barrier$iii$. Mucus coating
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