Basic General Knowledge
The exhaled air contains

carbon dioxide only
a mixture which has more carbon dioxide than oxygen
a mixture of carbon dioxide and nitrogen
a mixture of carbon dioxide, nitrogen and oxygen in which nitrogen has the highest percentage

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Basic General Knowledge
Yuri Gagarin was

both (a) and (b)
None of these
the first person to fly at great height of about 340 km from the earth
a Russian cosmonaut & became the first man to travel in space.

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