What will happen during lassaigne's test for nitrogen if the compound also contains sulphur?

Lassaigne's test for nitrogen is negative for which compound?

Which colour will appear in the Lassaigne's test if the compound contains both nitrogen and sulphur ?

During Lassaigne's test, nitrogen present in the organic compound is converted into

What do we notice in Lassaigne's test if the compound contains both nitrogen and sulphur ?

The blue colour developed during the lassaigne's test for nitrogen is due to

Assertion : Absence of blood red colouration, during the Lassaigne's test for nitrogen definitely shows the absence of sulphur in the organic compound. Reason : Organic compounds containing both nitrogen and sulphur will necessarily give blood red colouration during the Lassaigne's test for nitrogen.