Use of chlorofluorocarbons is not encouraged because

  • A
    They are harmful to the eyes of people that use it
  • B
    They damage the refrigerators and air conditioners
  • C
    They eat away the ozone in the atmosphere
  • D
    They destroy the oxygen layer

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Water samples with $BOD$ values of $4 \ ppm$ and $18 \ ppm$ respectively are:

Match the items in List-$I$ with the items in List-$II$ and select the correct answer from the given options:
List-$I$List-$II$
$A$. Bleaching of paper$I$. $CF_2Cl_2$
$B$. Eye irritant$II$. $H_2O_2$
$C$. Freons$III$. $Na_2AsO_3$
$D$. Herbicide$IV$. $PAN$
$V$. $CO_2$

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