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Answer: Option A
:
A
The atmosphere is a mixture of gases with 78% nitrogen, 21% oxygen, 0.03% carbon dioxide, 0.93% argon and small amounts of other gases. Air also contains variable amounts of water vapour, on an average around 1% at sea level and 0.4% over the entire atmosphere.
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A
The atmosphere is a mixture of gases with 78% nitrogen, 21% oxygen, 0.03% carbon dioxide, 0.93% argon and small amounts of other gases. Air also contains variable amounts of water vapour, on an average around 1% at sea level and 0.4% over the entire atmosphere.
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