Match List-I with List-II :
| List-I (Species) |
List-II (Maximum allowed concentration in ppm in drinking water) |
| A. F- |
I. < 50 ppm |
| B. SO\(^{2-}_4\) |
II. < 5 ppm |
| C. \(NO^-_3\) |
III. < 2 ppm |
| D. Zn |
iv. < 500 ppm |
(1) A-II, B-I, C-III, D-IV
(2) A-IV, B-III, C-II, D-I
(3) A-I, B-II, C-III, D-IV
(4) A-III, B-II, C-I, D-IV
