Match the following columns:
Column-$I$ Column-$II$
$P$. Physical barriers $I$. Acid in stomach,saliva in mouth,tears from eyes
$Q$. Physiological barriers $II$. Skin,mucus coating of epithelium lining the respiratory,gastrointestinal and urogenital tracts
$R$. Cellular barriers $III$. Interferons
$S$. Cytokine barriers $IV$. Polymorphonuclear leukocytes ($PMNL$-neutrophils),monocytes,$NK$ cells,macrophages

  • A
    $P-I, Q-II, R-III, S-IV$
  • B
    $P-II, Q-I, R-III, S-IV$
  • C
    $P-II, Q-I, R-IV, S-III$
  • D
    $P-I, Q-II, R-IV, S-III$

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