Select the option that contains only secondary lymphoid organs.

  • A
    $Spleen$, $Tonsils$, $Thymus$
  • B
    $Lymph \ nodes$, $Appendix$, $Tonsils$
  • C
    $Peyer’s \ patches$, $Tonsils$, $Bone \ marrow$
  • D
    $Tonsils$, $Thymus$, $Lymph \ nodes$

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