C-09-Q044mediumsingle_mcqThe reaction CaCO3+CO2+H2O→\mathrm{CaCO_3 + CO_2 + H_2O \rightarrow}CaCO3+CO2+H2O→—aCa(OH)2\mathrm{Ca(OH)_2}Ca(OH)2bCa(HCO3)2\mathrm{Ca(HCO_3)_2}Ca(HCO