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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
A B C D
1. II I IV III
2. III II I IV
3. IV II I III
4. II IV I III

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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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