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| List-$I$ (Metal) | List-$II$ (Concentration in $ppm$) |
|---|---|
| $A$. $Mn$ | $I$. $0.05$ |
| $B$. $Zn$ | $II$. $5.0$ |
| $C$. $Cd$ | $III$. $0.005$ |
| $D$. $Cu$ | $IV$. $3.0$ |
| $List-I$ (Pollutant) | $List-II$ (Source) |
| $A$. Microorganisms | $I$. Strip mining |
| $B$. Plant nutrients | $II$. Domestic sewage |
| $C$. Toxic heavy metals | $III$. Chemical fertilizer |
| $D$. Sediment | $IV$. Chemical factory |
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