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Dinosaursad toothed birds became extinct...

Dinosaursad toothed birds became extinct in

A

Beginning of cretaceous period of mesozoic era

B

End of permian period of palaeozoic era

C

End of triassic period of mesozoic era

D

Begining of jurassic period of mesozoic era

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AAKASH INSTITUTE-TEST 6-EXAMPLE
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