$a + 8e^- + b + 16 \, ATP \rightarrow c + d + 16 \, ADP + 16 \, \Pi$

• A
  $a = N_2, b = 8H^+, c = 2NH_3, d = H_2$
• B
  $a = N_2, b = 6H^+, c = 2NH_3, d = 8e^-$
• C
  $a = N_2, b = 16 \, ADP, c = NH_3, d = 16\Pi$
• D
  $a = N_2, b = 8H^+, c = 2NH_3, d = H_2$