Match the following columns:

Column-$I$	Column-$II$
$(i)$ Solvay process	$(p)$ $Na_2O$
$(ii)$ Evolve $CO_2$ on heating	$(q)$ $Na_2O_2$
$(iii)$ Aqueous solution is not neutral towards litmus	$(r)$ $NaHCO_3$
$(iv)$ Used as air purifier in submarine	$(s)$ $Na_2CO_3$

• A
  $i-r, ii-r, iii-p,q,r,s, iv-q$
• B
  $i-s, ii-r, iii-p,q,r,s, iv-q$
• C
  $i-r,s, ii-r, iii-p,q,r,s, iv-q$
• D
  $i-p,q,r,s, ii-r,s, iii-r, iv-q$