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Environmental Issues — BIOLOGY STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceBIOLOGYEnvironmental Issues1 Mark
MCQ
At what height over the earth does the ozone layer exist?
  • A
    $200\ km$
  • B
    $150\ km$
  • C
    $100\ km$
  • ✓
    $25\ km$
✓

Answer

Correct option: D.
$25\ km$

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