Ammonia (NH₃) gas and oxygen (O₂) gas react to form nitrogen gas and water vapor. If you had moles of each reactant, what would be the balanced chemical equation for this reaction?

a) 4 NH₃(g) + 5 O₂(g) → 6 N₂(g) + 6 H₂O(g)
b) 2 NH₃(g) + 3 O₂(g) → 2 N₂(g) + 6 H₂O(g)
c) NH₃(g) + O₂(g) → N₂(g) + 3 H₂O(g)
d) 3 NH₃(g) + 4 O₂(g) → 3 N₂(g) + 6 H₂O(g)