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Wastewater Story — Science STD 7 — Question

Gujarat BoardEnglish MediumSTD 7ScienceWastewater Story1 Mark
MCQ
In a filtration plant, water is filtered using layers of:
  • A
    Sand and clay.
  • B
    Clay and fine gravel.
  • C
    Sand and fine gravel.
  • ✓
    Sand, fine gravel and medium gravel.
✓

Answer

Correct option: D.
Sand, fine gravel and medium gravel.
Sand, fine gravel and medium gravel.

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