Match the following columns:
Column-$I$Column-$II$
$1$. Bone marrow$a$. Large at birth,very small at puberty
$2$. Thymus$b$. Site of production of all blood cells including lymphocytes
$3$. Spleen$c$. Traps microorganisms present in the tissue fluid
$4$. Lymph nodes$d$. Large bean-shaped organ

  • A
    $1-b, 2-a, 3-d, 4-c$
  • B
    $1-b, 2-d, 3-a, 4-c$
  • C
    $1-c, 2-d, 3-a, 4-b$
  • D
    $1-c, 2-a, 3-d, 4-b$

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