The diagram below shows a scrubber. Identify $A, B, C$ and $D$.

  • A
    $A-$Particulate matter,$B-$Clean air,$C-$Dirty air,$D-$Dust particle
  • B
    $A-$Dirty air,$B-$Clean air,$C-$Water line spray,$D-$Particulate matter
  • C
    $A-$Clean air,$B-$Dirty air,$C-$Particulate matter,$D-$Water line spray
  • D
    $A-$Dust particle,$B-$Clean air,$C-$Particulate matter,$D-$Collection plate grounded

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