Answer: option B
In double displacement reaction, the reactants interchange ions to form new compounds. The one higher in reactivity series displaces the ions of other reactant and combines with it to form new compound.
The reaction would take place as the following:
[tex]Ca_3N_2+Al_2O_3\rightarrow CaO+AlN[/tex]
The balanced reaction would be:
[tex]Ca_3N_2+Al_2O_3\rightarrow 3CaO+2AlN[/tex]
Hence, option B is the correct answer.
