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Match List I with List II
List-I (Species) List-2 (Maximum allowed concentration in ppm in drinking water)
A. F$$^-$$ I. < 50 ppm
B. SO$$_4^{2-}$$ II. < 5 ppm
C. NO$$_3^-$$ III. < 2 ppm
D. Zn IV. < 500 ppm
Choose the correct answer from the options given below.
For drinking water, the maximum allowed concentrations are:
$$F^- < 2\ \text{ppm}$$
$$SO_4^{2-} < 500\ \text{ppm}$$
$$NO_3^- < 50\ \text{ppm}$$
$$Zn < 5\ \text{ppm}$$
Therefore:
$$A \rightarrow III$$
$$B \rightarrow IV$$
$$C \rightarrow I$$
$$D \rightarrow II$$
Hence the correct matching is:
$${A-III,\;B-IV,\;C-I,\;D-II}$$
Hence, Option D is correct
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