A) \[ZnO\]and\[F{{e}_{2}}{{O}_{3}}.x{{H}_{2}}O\]
B) \[ZnC{{O}_{3}}\]and\[CaO\]
C) \[ZnO\]and\[MgO\]
D) \[F{{e}_{2}}{{O}_{3}}\]and\[CaC{{O}_{3}}.MgC{{O}_{3}}\]
Correct Answer: C
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