Which is an example of homology?

Eye of Octopus and Mammals Sweet Potato and Potato Flippers of Penguins and Dolphins Thorns of Bougainvillea and tendril of Cucurbita

Thorns of Bougainvillea and tendril of Cucurbita

The correct answer is Option (4) → Thorns of Bougainvillea and tendril of Cucurbita