Completely eliminating the pollutant sulfur dioxide, $\text{SO}_2$, is difficult. The gases are allowed to react with calcium hydroxide so that the $\text{SO}_2$ is removed. What is the main product formed at first?
- A$\text{Ca(HSO}_4)_2$
- B$\text{CaS}$
- C$\text{CaSO}_3$
- D$\text{CaSO}_4$