A dilute ferrous sulphate solution was gradually added to the beaker containing acidified permanganate solution. The light purple colour of the solution fades and finally disappears. Which of the following is the correct explanation for the observation?
(a) KMnO₄ is an oxidizing agent, it oxidizes FeSO₄.
(b) FeSO₄ acts as an oxidizing agent and oxidizes KMNO₄.
(c) The color disappears due to dilution; no reaction is involved.
(d) KMnO₄ is an unstable compound and de-composes in presence of FeSO₄. to a colorless compound.

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