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प्रश्न
Match the items of Column I with the items of Column II with reference to sewage.
| Column I | Column II | ||
| (a) | Inorganic impurities | (i) | phosphorus and nitrogen |
| (b) | Organic impurities | (ii) | nitrates and phosphates |
| (c) | Nutrients | (iii) | cholera and typhoid |
| (d) | Bacteria | (iv) | pesticides and herbicides |
उत्तर
| Column I | Column II | ||
| (a) | Inorganic impurities | (ii) | nitrates and phosphates |
| (b) | Organic impurities | (iv) | pesticides and herbicides |
| (c) | Nutrients | (i) | phosphorus and nitrogen |
| (d) | Bacteria | (iii) | cholera and typhoid |
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