Basic General Knowledge
The exhaled air contains

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

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Basic General Knowledge
Fa-Hien was

the discoverer of Puerto Rico and Jamaica
the first Buddhist pilgrim of India to visit China
None of these
the first Buddhist pilgrim of China to visit India during the reign of Chandragupta Vikramaditya

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