Identify $X, Y, Z$ from the given figure representing the exchange of gases in the alveoli.

  • A
    $X-$ Blood capillary,$Y-$ Basement substance,$Z-$ Alveolar wall
  • B
    $X-$ $RBC$,$Y-$ Blood capillary,$Z-$ Air
  • C
    $X-$ Air,$Y-$ Alveolar cavity,$Z-$ $RBC$
  • D
    $X-$ Basement substance,$Y-$ Air,$Z-$ $RBC$

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