Correct option (c) homologous organs
Explanation
Homologous organs are those organs which have a common fundamental anatomical plan and similar embryonic origin but perform varied functions. Forelimbs of cat, lizard used in walking, forelimbs of whale used in swimming and forelimbs of bats used in flying are the example for homologous organs. All are the examples of modified forelimbs, with the same type of bones. They have become different due to the adaptations to different habitat.