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Balance equations for these reactions occurring in a basic solution.
(A) \( \mathrm{CrO}_{4}^{2-}+\mathrm{S}^{2-} \rightarrow \mathrm{S}+\mathrm{CrO}_{2}^{-} \)
(B) \( \mathrm{MnO}_{4}^{-}+\mathrm{C}_{2} \mathrm{O}_{4}^{2-} \rightarrow \mathrm{CO}_{2}+\mathrm{MnO}_{2} \)
(C) \( \mathrm{ClO}_{3}^{-}+\mathrm{N}_{2} \mathrm{H}_{4} \rightarrow \mathrm{NO}+\mathrm{Cl}^{-} \)
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