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Which is incorrect:-A. `{:("Mixture","Separated by"),((1)Na_(2)S&CuS,H_(2)O):}`B. `{:("Mixture","Separated by"),((2)PbS & ZnS, NaCN):}`C. `{:("Mixture","Separated by"),((3)Fe_(2)O_(3)","Al_(2)O_(3),HCl):}`D. `{:("Mixture","Separated by"),((4)Al_(2)O_(3)","MgO,NaOH):}`

Answer» Correct Answer - C


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