Column I lists various impurities in drinking water and Column II lists effects/ diseases caused by these impurities.Column IColumn IIP. Nitrate > 45 ppm1. Minamata diseaseQ. Mercury > 0.001 ppm2. Discoloration of teethR. Fluoride < 1.0 ppm3. Cavities in teethS. Fluoride > 1.5 ppm4. Methemoglobenemia 5. PneumoconiosisThe correct match of the column I with column II is

• A. P - 4, Q - 5, R - 2, S - 3
• B. P - 4, Q - 1, R - 3, S - 2
• C. P - 4, Q - 1, R - 2, S - 3
• D. P - 5, Q - 4, R - 1, S - 2