Match the Column-$I$ with Column-$II$ regarding the partial pressures of gases ($PO_2$ and $PCO_2$) in different respiratory sites:
Column-$I$ Column-$II$
$A$. Alveoli $i$. $0.3 \ mmHg \ PCO_2$
$B$. Deoxygenated blood $ii$. $45 \ mmHg \ PCO_2$
$C$. Atmospheric air $iii$. $104 \ mmHg \ PO_2$
$D$. Tissue $iv$. $40 \ mmHg \ PO_2$

  • A
    $A-iii, B-iv, C-ii, D-i$
  • B
    $A-iii, B-iv, C-i, D-ii$
  • C
    $A-iv, B-iii, C-i, D-ii$
  • D
    $A-ii, B-i, C-iii, D-iv$

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Match the partial pressures of oxygen in different parts involved in diffusion compared to the atmosphere.
Column-$I$Column-$II$ ($PO_2$ in $mm\, Hg$)
$P$. Atmospheric air$I$. $159$
$Q$. Tissues$II$. $95$
$R$. Oxygenated blood$III$. $40$

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