Which of the following groups does not represent homologous organs?

Thorn of Bougainvillea and tendril of Cucurbita are examples of

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

Fossils are studied for:

The hand of a man,the wing of a bat,and the flipper of a seal represent:

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: