Which ONE of the following was NOT a reason for using oxygen?
a
it gave them psychologicl encouragement
b
it fortified them to live above the limit of natural acclimatization
c
it protects them against the unexpected changes of the weather
d
it quickens their journey to the summit
e
it helps them to survive the worst effects of the weather
Explanation
Correct Option
aNo explanation available
Video Explanation
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