Which one among the following is an example of homology?

Which one of the following is $NOT$ an example of analogous organs?

The presence of gills in the tadpole of a frog indicates that:

The eye of an octopus and the eye of a cat show different patterns of structure,yet they perform similar functions. This is an example of:

In the embryos of all vertebrates,including humans,a row of vestigial gill slits appears behind the head,but they function only in fish and not in other adult vertebrates. This observation was challenged by which scientist?

What does the evolution of the heart from a two-chambered to a three-chambered and finally a four-chambered structure demonstrate?