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UPSC Prelims 2013Question 14Geography

Variations in the length of daytime and nighttime from season to season are due to

Options

  1. (a)the earth’s rotation on its axis
  2. (b)the earth’s revolution round the sun in an elliptical manner
  3. (c)latitudinal position of the place
  4. (d)revolution of the earth on a tilted axis

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