Consider the following sequence of reactions. The solution \( D \) and the residue \( E \) respe...

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Consider the following sequence of reactions.
The solution \( D \) and the residue \( E \) respectively contain:
(a) \( \mathrm{Hg}_{2} \mathrm{~S}_{2} \mathrm{O}_{3} \) and \( \mathrm{Hg}_{2} \mathrm{~S} \)
(b) \( \mathrm{PbS}_{2} \mathrm{O}_{3} \) and \( \mathrm{Pb} \)
(c) \( \left[\mathrm{Ag}\left(\mathrm{S}_{2} \mathrm{O}_{3}\right)_{2}\right]^{3-} \) and \( \mathrm{Ag}_{2} \mathrm{~S} \)
(d) None of these
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