Sulphur dioxide is one of the components of polluted air. $SO_{2}$ is also a major contributor to acid rain. The correct and complete reaction to represent acid rain caused by $SO_{2}$ is ..... .

• A
  $2 SO_{2} + O_{2} \rightarrow 2 SO_{3}$
• B
  $SO_{2} + O_{3} \rightarrow SO_{3} + O_{2}$
• C
  $SO_{2} + H_{2}O_{2} \rightarrow H_{2}SO_{4}$
• D
  $2 SO_{2} + O_{2} + 2 H_{2}O \rightarrow 2 H_{2}SO_{4}$