Question

Which is the correct arrangement of the periods of Paleozoic era in an ascending order of the geological time scale?

• A. Cambrian $\to$ Devonian $\to$ Ordevician $\to$ Silurian $\to$ Carboniferous $\to$ Permian
• B. Cambrian $\to$ Ordovician $\to$ Silurian $\to$ Devonian $\to$ Carboniferous $\to$ Permian
• C. Cambrian $\to$ Ordovician $\to$ Devanian $\to$ Silurian $\to$ Carboniferous $\to$ Permian
• D. Silurian $\to$ Devonian $\to$ Cambrian $\to$ Ordovician $\to$ Permian $\to$Carboniferous

Answer 1

The correct option is B Cambrian $\to$ Ordovician $\to$ Silurian $\to$ Devonian $\to$ Carboniferous $\to$ Permian

Palaezoic era is the era of ancient life and correct arrangement of periods in this era is:
Cambrian
$\downarrow$
Ordovician (Age of invertebrates)
$\downarrow$
Silurian
$\downarrow$
Devonian (Age of fishes)
$\downarrow$
Carboniferous (Age of amphibians)
$\downarrow$
Permian