(viii) Amongest the following groups of oxides, the group containing oxides that cannot be reducing by carbon to give the respec

(viii) Amongest the following groups of oxides, the group containing oxides that cannot be reducing by carbon to give the respective metals is.
A. `Cu_(2) O,SnO_(2)`
B. `Fe_(2) O_(3),ZnO`
C. `CaO,K_(2)O`
D. `PbO,Fe_(3) O_(4)`

(viii) Amongest the following groups of oxides, the group containing oxides that cannot be reducing by carbon to give the respective metals is.

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