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Environmental Issues — BIOLOGY STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceBIOLOGYEnvironmental Issues1 Mark
MCQ
Bio$-$indicators are used for:
  • A
    Oxygen demand
  • B
    Air pollution
  • C
    Mineral present
  • ✓
    All of the above
✓

Answer

Correct option: D.
All of the above

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