C-12-Q021mediumsingle_mcqThe raw materials for preparing baking soda are—aNaOH,CO2,H2O\mathrm{NaOH, CO_2, H_2O}NaOH,CO2,H2ObNH3,NaCl,H2O,CO2\mathrm{NH_3, NaCl, H_2O, CO_2}NH3,NaCl,H2O,COcNa2CO3,H2O\mathrm{Na_2CO_3, H_2O}Na2CO3,H2dNaCl,HCl,H2O\mathrm{NaCl, HCl, H_2O}NaCl,HCl,H2O