Origin of first toothed birds and gymnosperms occurred during

Cretaceous

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Jurassic

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Triassic

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Permian

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Solution

The correct option is C Triassic
The Triassic Period was the first period of the Mesozoic Era and occurred 251 -199 million years ago. The Triassic period begins with the end of the Permian period and ends with the beginning of the Jurassic period.
Origin of first toothed birds and gymnosperms occurred during the Triassic period.
So, the correct answer is 'Triassic'.

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