Which of the following salt would give \( \mathrm{SO}_{2} \) with h...

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Which of the following salt would give \( \mathrm{SO}_{2} \) with hot and dil. \( \mathrm{H}_{2} \mathrm{SO}_{4} \) and also decolourises \( \mathrm{Br}_{2} \) water?
(a) \( \mathrm{Na}_{2} \mathrm{SO}_{3} \)
(b) \( \mathrm{NaHSO}_{4} \)
(c) \( \mathrm{Na}_{2} \mathrm{SO}_{4} \)
(Manipal 2008)
\( \mathrm{P} \)
(d) \( \mathrm{Na}_{2} \mathrm{~S} \)
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