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Column – I (species) Column – II (Harmful effects when excess)
i) ${NO}_{3}^{-}$ A) Laxative effect
ii) ${SO}_{4}^{- 2}$ B) Kidney damage
iii) $Pb$ C) Blue baby syndrome
iv) $F^{-}$ D) brittleness of bones
Correct Match is

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I - C ; II - A ; III - B ; IV - D

I - B ; II - A ; III - C ; IV - D

I - A ; II - B ; III - C ; IV - D

I - C ; II - B ; III - A ; IV - D

answer is A.

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Detailed Solution

${SO}_{4}^{- 2} > 500 ppm . . . . . . Laxative effect$
${NO}_{3}^{-} > 50 ppm . . . . . Bluebaby syndrome$
$F^{-} > 10 ppm . . . . . Brittleness of bones$
$Pb > 50 ppb . . . . . . . damages kidney$

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