Which of the following statements is/are wrong?

Benzene diazonium chloride does not  give positive lassaigne’s test because they loose N₂ gas even at moderate temperatures.

In lassaigne’s test for nitrogen, Prussian blue colour due to the formation of the ferric  –ferro cyanide

When ${\text{FeCl}}_{\text{3}}$ solution is added to the Lassaigne’s extract, a blue solution is obtained, which indicates the presence of nitrogen

Aniline can give positive Lassaigne’s test