Match the columns Column-I Column-IIA500 myaISea weeds existedB350 myaII Invertebrates were formed and activeC320 myaIII Reptiles of different shapes and sized dominatedD200 myaIVJawless fishes evolved ABCD1.IIIIVIII2.IIIIIIIV3.IVIIIIII4.IIIVIIII

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Match the columns

	Column-I		Column-II
A	500 mya	I	Sea weeds existed
B	350 mya	II	Invertebrates were formed and active
C	320 mya	III	Reptiles of different shapes and sized dominated
D	200 mya	IV	Jawless fishes evolved

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answer is D.

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Detailed Solution

500 mya	Invertebrates were formed and active
350 mya	Jawless fishes evolved
320 mya	Sea weeds existed
200 mya	Reptiles of different shapes and sized dominated

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