The first true terrestrial vertebrates were:

Amphibians

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Reptiles

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Aves

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Mammals

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Solution

The correct option is B Amphibians
The correct answer is A.
The earliest vertebrates were the hagfish and other fishes which lived in water. With evolution, the Amphibians evolved from the jawless fishes and could survive on land (as they had lungs). Therefore, amphibians are considered the first terrestrial vertebrates.

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The animals (Kingdom Animalia) are mainly grouped under two categories

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(d) vertebrates and invertebrates

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