A white solid A reacts with dilute H2SO4 to produce a colourless gas B and a colourless solution C. The reaction between B and acidified dichromate yields a green solution and a slightly coloured precipitate D. The substance D, when burnt in air, gives a gas E which reacts with B to yield D and a colourless liquid. Anhydrous copper sulphate turns blue with this colourless liquid. The addition of aqueous NH3 or NaOH to C produces a precipitate that dissolves in an excess of the reagent to form a clear solution.
What would happen if the gas E were passed through an acidified KMnO4 solution?
a. Bleaching of the permanganate solution without any precipitation
b. Bleaching of the permanganate solution which would show a yellowish white turbidity
c. Bleaching of the permanganate solution and the formation of a brown precipitate
d. No action