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Wastewater Story — Science STD 7 — Question

Gujarat BoardEnglish MediumSTD 7ScienceWastewater Story1 Mark
MCQ
Activate sludge is about ___________ water.
  • A
    $10\%$
  • B
    $25\%$
  • C
    $79\%$
  • ✓
    $97\%$
✓

Answer

Correct option: D.
$97\%$
$97\%$

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