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The Question Has Four Options. Choose the Correct Answer: Sewage is Broken Down in - Biology

MCQ

The question has four options. Choose the correct answer:
Sewage is broken down in

Options

  • primary treatment

  • secondary treatment

  • tertiary treatmen

  • all the above

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Solution

secondary treatment

Concept: Domestic Waste
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APPEARS IN

Frank Class 9 Biology ICSE
Chapter 23 Safe Disposal of Wastes
Exercise | Q 12.4 | Page 212
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