Darwin's finches are a good example of

The original birds were . . . . . . ,from which the various Darwin's finches arose.

The diversity in the type of beaks of finches adapted to different feeding habits on the Galapagos Islands,as observed by Darwin,provides evidence for:

Given below are two statements with respect to homologous organs.
Statement $I$: These organs are structurally similar but perform different functions.
Statement $II$: Differences in homologous organs are examples of adaptive radiation.
In the light of the above statements,choose the correct option from the list given below.

Select the odd one out regarding adaptive radiation in Australian marsupials.

Which of these is $NOT$ an example of adaptive radiation?