The correct order of eras, from most ancient to most recent, along geological time scale is

Precambrian period of the Archaeozoic era (3800 million yrs ago) is marked by the origin of life. Palaeozoic era (600 mya -230 mya) is the ?era of ancient life?.  Mesozoic era (from 230 million yrs ago to 63 million yrs ago) is the era of medieval life and includes three periods namely, Cretaceous (135 million yrs), Jurassic (180 million yrs) and Triassic (225 million yrs). The Cenozoic era (65 million years ago) is also known as ?age of mammals? because the rise of first placental mammals, their diversification, and evolution, as well as origin and evolution of modern mammals and that of man, occurred during this era. Thus, the correct answer is option D.