Which one of the following does not give tetrathionate as the product, when treated with an aq solution of hypo?

Which one of the following does not give tetrathionate as the product, when treated with an aq solution of hypo?
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Which one of the following does not give tetrathionate as the product, when treated with an aq solution of hypo? A. ... )` C. `CuC1_(2)` D. `FeC1_(3)`
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