Consider the relation between the items in the first pair and write the correlation for second pair:
(i) Industrialization: Sulphur compounds : :…………… : Lead compounds
(ii) City where smoke and soot caused it to be called black city : Petersburg : : Indian city where worst ever industrial accident has occurred : …………
(iii) Arsenic and Cadmium : Inorganic water pollutants : : Weedicides and insecticides : ………….
