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Select the group of oxides that can not ...

Select the group of oxides that can not be reduced by carbon to give the respective matals.

A

`CaO,K_(2)O`

B

`Fe_(2)O_(3),ZnO`

C

`Cu_(2)O,SnO_(2)`

D

`Fe_(2)O_(3),PbP.`

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The correct Answer is:
A
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