Assertion :The earth was once dominated by dinosaurs. Reason: Dinosaurs got extinct due to natural calamities.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
Dinosaurs are a diverse group of reptiles of the clade Dinosauria. They first appeared during the Triassic period, between 243 and 233.23 million years ago. The earth was once dominated by dinosaurs but not now because they got extinct due to natural calamities.

So, the correct answer is 'option A'.

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