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) \[{{[Fe{{({{C}_{2}}{{O}_{4}})}_{3}}]}^{-4}}\]
Correct Answer: B
Solution :
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