Which of the following is considered a missing link in evolution?

What was the contribution of the scientist $Von \ Baer$ to the field of evolutionary biology?

Which of the following is an example of convergent evolution?

The embryological support for evolution was proposed by:

State the modifications of forelimb in animals as an example of homology.

Given below are two statements: one is labelled as Assertion $A$ and the other is labelled as Reason $R$.
Assertion $A$: Forelimbs of humans and bats are homologous.
Reason $R$: Forelimbs of humans and bats have similar anatomical structure.
In the light of the above statements, choose the most appropriate answer from the options given below: