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Shelter High ! — EVS STD 5 — Question

Gujarat BoardEnglish MediumSTD 5EVSShelter High !1 Mark
MCQ
At higher altitudes which gas in the atmosphere decreases in amount causing us difficulty in breathing$?$
  • A
    Carbon dioxide
  • B
    Hydrogen
  • ✓
    Oxygen
  • D
    Helium
✓

Answer

Correct option: C.
Oxygen

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