The correct option is A (i), (ii) and (iv)
Fossils are the preserved remains, or traces of remains, of ancient organisms in rocks. A fossil can preserve an entire organism or just part of an organism. Examples of fossils include bones, shells, feathers, exoskeletons, stone imprints of animals or microbes, hair, oil, coal, and DNA remnants.
Geological evidence shows that dinosaurs became extinct at the boundary between the Cretaceous and Paleogene eras, about 65 million years ago.
The animals with lobe fins evolved into the first amphibians that lived on both land and water.
Study of fossils is called paleontology