InK contains `Fe^(3+)` .Spot of ink can be removed by addition of ` C_(2)O_(4)^(2-)` complex formed is
InK contains `Fe^(3+)` .Spot of ink can be removed by addition of ` C_(2)O_(4)^(2-)` complex formed is
A. `[Fe(C_(2)O_(4))_(6)]^(3-)`
B. `[Fe(C_(2)O_(4))_(3)]^(3-)`
C. `[Fe(C_(2)O_(4))_(3)]^(2-)`
D. `[Fe(C_(2)O_(4))_(3)]^(4-)`
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