In this set of chemical reactions, which is a single replacement reaction?
a. K₂SO₄ (aq) + BaCl₂(aq) → BaSO₄ (s) + 2KCl (aq)
b. CuSO₄ (aq)+ BaCl₂ (aq) → BaSO₄ (s) + CuCl₂ (aq)
c. Zn (s) + H₂SO₄ (aq) → ZnSO₄ (aq) + H₂ (g)
d. Pb(NO₃)₂ (aq) + 2NaCl (aq). →PbCl₂ (s) + 2NaNO₃ (aq)
e. AgNO₃ (aq) + NaCl (aq) → AgCl (s) + NaNO₃ (aq)