The pair of compounds having metals in their highest oxidation state is :
MnO2 and CrO2Cl2
[NiCl4]2− and [CoCl4]2−
[Fe(CN)6]3− and [Cu(CN)4]2−
[FeCl4]− and Co2O3
Option 1)
MnO2 and CrO2Cl2
Option 2)
[NiCl4]2− and [CoCl4]2−
Option 3)
[Fe(CN)6]3− and [Cu(CN)4]2−
Option 4)
[FeCl4]− and Co2O3
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