Which of the Following Is a Gas-Evolution Reaction

Multiple Choice

Which of the following is a gas-evolution reaction?

A) 2 C₂H₆(l) + 7 O₂(g) → 4 CO₂(g) + 6 H₂O(g)
B) 2 H₂(g) + O₂(g) → 2 H₂O(g)
C) LiCl(aq) + NaNO₃(aq) → LiNO₃(aq) + NaCl(g)
D) NH₄Cl(aq) + KOH(aq) → KCl(aq) + NH₃(g) + H₂O(l)
E) None of the above are gas-evolution reactions.