Forelimbs of Cat, lizard used in walking, forelimbs of a whale used in swimming and forelimbs of bats used in flying are an example of :
Analogous structure
Adaptive radiation
Homologous organs
Convergent evolution
As we have already studied in Evidence of Organic Evolution: Homologous Organs & Analogous Organs -
The organs which have the same fundamental structure but the difference in functions are called homologous organs. Hence, the correct option is (c).