Arrange the following geological periods in chronological order.
(A). Cretaceous
(B). Triassic
(C). Permian
(D). Jurassic
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → (C), (B), (D), (A)
Chronological order runs from the oldest period to the most recent. NCERT’s chart of vertebrate evolution (shown below) lists the periods with their age in million years ago (mya); the lower a period sits on the chart, the older it is.
(C) Permian — first. It is the oldest of the four, coming just after the Carboniferous. Early reptiles had already appeared and were branching into new groups.
(B) Triassic — second. It follows the Permian. Thecodonts and therapsids lived around this time.
(D) Jurassic — third. It follows the Triassic; this is the age when the dinosaurs spread widely.
(A) Cretaceous — last. It is the most recent of the four, just before the Tertiary. The dinosaurs disappeared at its end, about 65 mya.
NCERT Extract:
A Brief Account of Evolution –
