During Lassaignes test, \( \mathrm{N} \) and \( \mathrm{S} \) present in an organic compound cha...

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During Lassaignes test, \( \mathrm{N} \) and \( \mathrm{S} \) present in an organic compound changes into-
(a) \( \mathrm{Na}_{2} \mathrm{~S} \) and \( \mathrm{NaCN} \)
(b) NaSCN
(c) \( \mathrm{Na}_{2} \mathrm{SO}_{4} \) and \( \mathrm{NaCN} \)
(d) \( \mathrm{Na}_{2} \mathrm{~S} \) and \( \mathrm{NaCNO} \)
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