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Sources of Waste — BIOLOGY STD 9 — Question

ICSE BoardEnglish MediumSTD 9BIOLOGYSources of Waste1 Mark
MCQ
Which one is the most toxic?
  • A
    Carbon
  • ✓
    $CO$
  • C
    $CO _2$
  • D
    $SO _2$
✓

Answer

Correct option: B.
$CO$

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