Match List I with List II and select the answer using the code given below the Lists: List I (Reaction) — List II (Type) A. CaO (s) + H2O (l) -> Ca(OH)2 (aq) — 1. Single displacement B. CaCO3 (s) -> CaO (s) + CO2 (g) — 2. Double displacement C. Pb (s) + CuCl2 (aq) -> PbCl2 (aq) + Cu (s) — 3. Combination D. Na2SO4 (aq) + BaCl2 (aq) -> BaSO4 (s) + 2NaCl (aq) — 4. Decomposition