The forelimbs of whales, bats, cheetahs and humans share similar anatomical structures and have humerus, radius, ulna, carpals, metacarpals and phalanges. Although this suggests that the forelimb bones in these organisms developed from a common ancestor, they were adapted for different functions. The most appropriate option that captures the evolution of these forelimb bones is:

• Correct answer
  A

  Divergent and orthologous
• B

  Convergent and homologous
• C

  Divergent and paralogous
• D

  Convergent and orthologous

Hence, the correct answer is option: 'A'.