Which is latest era of geological time scale?

The Azoic era is the era without life which includes the origin of the earth, its cooling down and other changes to make it suitable for life forms.  The Proterozoic era (2000 million yrs ago and spanned for 1500 million years), the era of early life, is marked by a build-up of oxygenic atmosphere and appearance of the first eukaryotic cell.  Mesozoic era (from 230 million years ago to 63 million yrs ago) is the era of medieval life and includes three periods namely, Cretaceous (135 million years), Jurassic (180 million years) and Triassic (225 million years). It is also known as the age of gymnosperms or age of reptiles. The Cenozoic era is the era of modern life and is also known as the age of mammals and angiosperms. It began 63 million yrs ago and is still continuing which makes it the most recent/latest. Thus the correct answer is option C.