Basic General Knowledge
National Anthem was first sung on

January 24, 1950 by the Constituent Assembly of India
January 26, 1959 by the Government of India
December 27, 1911 during the Indian National Congress Session at Calcutta
None of these

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Basic General Knowledge
The exhaled air contains

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

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