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प्रश्न
Which one of the following is the most important constituent of the atmosphere for human beings?
पर्याय
Water vapour
Nitrogen
Dust particle
Oxygen
MCQ
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उत्तर
Oxygen
Explanation:
Oxygen is the most important constituent of the atmosphere for human beings because it is essential for respiration, the process by which our bodies produce energy. Without oxygen, human life cannot survive, making it vital despite nitrogen being more abundant.
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