Match the following:
List-$I$ (Pollutant concentration limit in water) List-$II$ (Effect)
$A. Pb > 50 \ ppb$ $I. \text{Liver damage}$
$B. SO_4^{2-} > 500 \ ppm$ $II. \text{Laxative effect}$
$C. NO_3^{-} > 50 \ ppm$ $III. \text{Blue baby syndrome}$
$D. F^{-} > 2 \ ppm$ $IV. \text{Brown mottling of teeth}$
The correct answer is

  • A
    $A-I, B-II, C-III, D-IV$
  • B
    $A-I, B-II, C-IV, D-III$
  • C
    $A-II, B-I, C-III, D-IV$
  • D
    $A-III, B-II, C-I, D-IV$

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