Basic General Knowledge
National Anthem was first sung on

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

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Basic General Knowledge
On a night when the sky is clear, the temperature may dip considerably; on a cloudy night the temperature will usually dip much less. The reason for this difference is that

the clear sky allows the cold of outer space to reach the earth
current of air carry the heat away from the earth on a clear night
the clear sky allows radiant energy to escape readily from the earth
on a cloudy night the clouds are warm and therefore retard the cooling

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