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UPSC Prelims 2011Question 95Geography

The jet aircrafts fly very easily and smoothly in the lower stratosphere. What could be the appropriate explanation ? 1. There are no clouds or water vapour in the lower stratosphere 2 There are no vertical winds in the lower stratosphere. Which of the statements given above is/are correct in this context ?

Options

  1. (a)1 only
  2. (b)2 only
  3. (c)Both 1 and 2
  4. (d)Neither 1 nor 2

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