Let's analyze each option: Option A: Cuprite is a copper oxide (formula: Cu2O ). Haematite is an iron oxide (formula: Fe2O3 ). Both are oxide ores, so this match is correct. Option B: Calamine is a historical name used for zinc carbonate minerals like smithsonite (formula: ZnCO3 ). Siderite is an iron carbonate (formula: FeCO3 ). Both belong to the carbonate ore group, so this match is correct. Option C: Magnetite is an iron oxide (formula: Fe3O4 ). The term "matachite" is questionable and "sticate ores" is not a standard classification. Magnetite belongs to oxide ores, not a supposed "sticate" category. Therefore, this match is incorrect. Option D: Sphalerite is a zinc sulphide (formula: ZnS ). "Fool's gold" refers to pyrite, which is an iron sulphide (formula: FeS2 ).
Both are sulphide ores, making this match correct. Based on the above, the incorrectly matched set is in Option C.