Which one is the correct summary equation of biological nitrogen fixation?

${\mathrm{N}}_2+8{\mathrm{e}}^{-}+8{\mathrm{H}}^{+}+16\mathrm{ATP}\to 2{\mathrm{NH}}_3+{\mathrm{H}}_2+16\mathrm{ADP}+16{\mathrm{P}}_{\mathrm{i}}$

$2{\mathrm{NH}}_3+4{\mathrm{O}}_2\to 2{\mathrm{H}}^{+}+2{\mathrm{NO}}_3^{-}$

${\mathrm{N}}_2+8{\mathrm{e}}^{-}+8{\mathrm{H}}^{+}+8\mathrm{ATP}\to {\mathrm{NH}}_3+{\mathrm{H}}_2+16\mathrm{ADP}+16{\mathrm{P}}_{\mathrm{i}}$

$2{\mathrm{NH}}_3+3{\mathrm{O}}_2\to 2{\mathrm{NO}}_2^{-}+2{\mathrm{H}}^{+}+2{\mathrm{N}}_2\mathrm{O}$