Which of the following radical can not be confirmed by using dil.HCl? (a) \( \mathrm{S}^{2-} \) ...

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Which of the following radical can not be confirmed by using dil.HCl?
(a) \( \mathrm{S}^{2-} \)
(b) \( \mathrm{S}_{2} \mathrm{O}_{3}^{2-} \)
(c) \( \mathrm{CO}_{3}^{2-} \)
(d) \( \mathrm{NO}_{2}^{-} \)
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