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| 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 |
| List-$I$ | List-$II$ |
| $(a)$ Gambusia | $(i)$ Typhoid vaccine |
| $(b)$ Sporozoite | $(ii)$ Cancer |
| $(c)$ $TAB$ | $(iii)$ Allergy |
| $(d)$ Pollen grains | $(iv)$ Mosquito larvae |
| $(e)$ Smoking | $(v)$ Malaria |
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