Statement I : In 'Lassaigne's Test, when both nitrogen and sulphur are present in an organic compound, sodium thiocyanate is formed.

Statement II : If both nitrogen and sulphur are present in an organic compound, then the excess of sodium used in sodium fusion will decompose the sodium thiocyanate formed to give $\mathrm{NaCN}$ and ${\mathrm{Na}}_2\mathrm{S}$.

choose the most appropriate answer from the options given below :

In the test of halogens from sodium extract, a small amount of dilute HNO₃ is added. This is because in testing the halogen from the Lassigne's extract, it contains halogens. Therefore, dilute nitric acid is added before testing halogens to expel all the gases if evolved.
 

Ferric Chloride (FeCl₃​) that reacts with Sodium Thiocyanate (NaCNS) to form Ferric Thiocyanate [Fe(CNS)₃​] which is blood red in color. This test can be used as a confirmatory test for organic compounds containing both Nitrogen and Sulfur .