Which one of the following organisms bears hollow and pneumatic long bones?

  • A
    Neophron
  • B
    Hemidactylus
  • C
    Macropus
  • D
    Ornithorhynchus

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$S -$ Assertion: Ostrich is an animal belonging to the class Aves.
$R -$ Reason: Ostrich is a flightless bird.

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