What is the effect of $DDT$ in birds?

  • A
    Disturbs metabolism of magnesium
  • B
    Disturbs metabolism of calcium
  • C
    Disturbs metabolism of potassium
  • D
    Prevents excretion of calcium

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Choose the incorrect sentence regarding $BOD$.

Carbon monoxide $(CO)$ is a pollutant because it:

Minamata disease is a pollution-related disease that results from:

$A$: Water hyacinth is one of the most invasive weeds.
$R$: It increases the dissolved oxygen of water.

Which of the following is/are primary air pollutant$(s)$?

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