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Match List I with List II : List-I (Species) A. F− B. SO4^2− C. NO3− D. Zn List-II (Maximum allowed concentration in ppm in drinking water) I. < 50 ppm II. < 5 ppm III. < 2 ppm IV. < 500 ppm Choose the correct answer from the options given below:

1. A-I, B-II, C-III, D-IV
2. A-II, B-I, C-III, D-IV
3. A-IV, B-III, C-II, D-I
4. A-III, B-II, C-I, D-IV

Correct answer: A-I, B-II, C-III, D-IV

Solution

The correct option matches each species with its respective maximum allowed concentration in drinking water based on health guidelines, ensuring that fluoride (F−) is limited to less than 50 ppm, sulfate (SO4^2−) to less than 5 ppm, nitrate (NO3−) to less than 2 ppm, and zinc (Zn) to less than 500 ppm.

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