What is the partial pressure (in $mm \,Hg$) of $O_2$ and $CO_2$ in alveoli?

  • A
    $O_2 = 104, CO_2 = 30$
  • B
    $O_2 = 104, CO_2 = 40$
  • C
    $O_2 = 100, CO_2 = 0.3$
  • D
    $O_2 = 200, CO_2 = 0.3$

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