In Lassaigne's test, if both $N$ and $S$ are present in the organic compound, they are converted to:

N a_{2} S

and

N a C N

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N a S C N

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N a_{2} S O_{3}

and

N a C N

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N a_{2} S

and

N a C N O

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Solution

The correct option is C $N a S C N$
When only $N$ or $S$ are present,

$N a + C + N Δ \to N a C N$

$2 N a + S Δ \to N a_{2} S$

If both nitrogen and sulphur are present in an organic compound, fusion will convert it into sodium thiocyanate.
$N a + C + N + S Δ \to N a S C N$

Option B is correct.

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