What are the partial pressures of oxygen $(PO_2)$ and carbon dioxide $(PCO_2)$ in the alveolar air?

  • A
    $PO_2 = 106\, mmHg, PCO_2 = 42\, mmHg$
  • B
    $PO_2 = 102\, mmHg, PCO_2 = 40\, mmHg$
  • C
    $PO_2 = 100\, mmHg, PCO_2 = 44\, mmHg$
  • D
    $PO_2 = 104\, mmHg, PCO_2 = 40\, mmHg$

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