Select the correct pair:
Column-$I$ Column-$II$
$A$. Physiological barrier $1$. Skin
$B$. Cellular barrier $2$. Macrophages
$C$. Physical barriers $3$. Interferons
$D$. Cytokine barriers $4$. Tears
$5$. Mucus

  • A
    $A-1,5, B-2, C-3, D-4$
  • B
    $A-4, B-2, C-1,5, D-3$
  • C
    $A-3, B-1,5, C-2, D-4$
  • D
    $A-4, B-1, C-2,3, D-5$

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Statement $I$: Passive immunity is acquired when readymade antibodies are received by body cells.
Statement $II$: Resistance induced by $BCG$ vaccine is an example of passive immunity.
In the light of the above two statements,choose the correct answer from the options given below.

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Active immunity may be acquired by

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