Match the items given in column $\mathrm{A}$ and $\mathrm{B}$ :
Column $\bar{A}$ Column B
(a) Catalytie converter
(i) Particulate matter
(b) Electrostatic precipitator
(ii) Carbon monoxide and nitrogen oxldes
(c) Earmuffs
(iii) High nolse level
(d) Landfills
(iv) Solid wastes