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A) \[C{{u}_{2}}O,{{K}_{2}}O\]
B) \[F{{e}_{2}}{{O}_{3}},ZnO\]
C) \[CaO,{{K}_{2}}O\]
D) \[PbO,F{{e}_{3}}{{O}_{4}}\]
Correct Answer: C
Solution :
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