Match List-$I$ with List-$II$.

List-$I$	List-$II$
$(a)$ $2 SO_{2(g)} + O_{2(g)} \rightarrow 2 SO_{3(g)}$	$(i)$ Acid rain
$(b)$ $HOCl_{(g)} \stackrel{h \nu}{\longrightarrow} \dot{O}H + \dot{Cl}$	$(ii)$ Smog
$(c)$ $CaCO_{3} + H_{2}SO_{4} \rightarrow CaSO_{4} + H_{2}O + CO_{2}$	$(iii)$ Ozone depletion
$(d)$ $NO_{2(g)} \stackrel{h \nu}{\longrightarrow} NO_{(g)} + O_{(g)}$	$(iv)$ Tropospheric pollution

Choose the correct answer from the options given below.

• A
  $(a)-(i), (b)-(ii), (c)-(iii), (d)-(iv)$
• B
  $(a)-(ii), (b)-(iii), (c)-(iv), (d)-(i)$
• C
  $(a)-(iv), (b)-(iii), (c)-(i), (d)-(ii)$
• D
  $(a)-(iii), (b)-(ii), (c)-(iv), (d)-(i)$