$A$ white precipitate was formed when $BaCl_{2}$ was added to the water extract of an inorganic salt. Further,a gas $X$ with a characteristic odour was released when the formed white precipitate was dissolved in dilute $HCl$. The anion present in the inorganic salt is ..... .
- A$I^{-}$
- B$SO_{3}^{2-}$
- C$S^{2-}$
- D$NO_{2}^{-}$
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