AP EAMCET Medical 2017 Shift 2 Paper

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Question : 49 of 160
 
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Study the following combinations regarding the origin and ancestry of different vertebrate groups.
Group Ancestor Origin period
I)Aves Theropod dinosaurs Cretaceous
II)Mammalia Tlieropsid reptiles Triassic
III)Pisces PlacodemisSilurian
IV)AmphibiaOsteolepids Devonian

Identify the incorrect combinations of the above
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