Correct option is B
Explanation-
Cambrian Period (D)
This is the earliest period among the four. It started around 541 million years ago. This period is famous for the "Cambrian Explosion", where many different life forms suddenly appeared in the fossil record. It marks the beginning of the Phanerozoic Eon.
Jurassic Period (C)
After Cambrian, much later came the Jurassic. This period is well known as the Age of Dinosaurs. It occurred roughly between 201 to 145 million years ago.
Cretaceous Period (B)
After the Jurassic, the Cretaceous period followed. This is the period where dinosaurs went extinct at the end due to a mass extinction event. It lasted from about 145 to 66 million years ago.
Quaternary Period (A)
This is the most recent period, starting around 2.6 million years ago and continuing to the present. It includes the ice ages and the evolution of modern humans.
Therefore, the correct sequence from earliest to most recent is:
Cambrian → Jurassic → Cretaceous → Quaternary
D → C → B → A
Thus, the correct answer is:
Option b - (D-C-B-A)
