Which of the following reaction is correct?

$\displaystyle 4 \mathrm{LiNO}_3 \xrightarrow{\Delta} 2 \mathrm{Li}_2 \mathrm{O}+4 \mathrm{NO}_2+\mathrm{O}_2$

$\displaystyle 2 \mathrm{LiNO}_3 \xrightarrow{\Delta} 2 \mathrm{NaNO}_2+\mathrm{O}_2$

$\displaystyle 2 \mathrm{LiNO}_3 \longrightarrow 2 \mathrm{Li}+2 \mathrm{NO}_2+\mathrm{O}_2$

$\displaystyle 4 \mathrm{LiNO}_3 \xrightarrow{\Delta} 2 \mathrm{Li}_2 \mathrm{O}+2 \mathrm{~N}_2 \mathrm{O}_4+\mathrm{O}_2$