From the following balanced equation, 4NH₃(g) + 5O₂(g) → 4NO(g) + 6H₂O(l), how many grams of NH₃ must react to form 3.78g H₂O?
a) 0.623 g
b) 1.245 g
c) 2.490 g
d) 3.780 g