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Question
Mountaineers carry oxygen cylinders with them because
Options
there is no oxygen on high mountains.
there is deficiency of oxygen on mountains at high altitude.
oxygen is used for cooking.
oxygen keeps them warm at low temperature.
Solution
there is deficiency of oxygen on mountains at high altitude.
Explanation:
With increase in altitude, the atmosphere gets thinner and levels of oxygen decreases. This makes it difficult to breathe in higher altitudes as oxygen supply is reduced.
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