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UPSC Prelims 1979Question 41Science & Technology

In high mountain regions bleeding through nose occurs because

Options

  1. (a)The pressure of the blood capillaries is higher than the outside pressure
  2. (b)The pressure at high altitudes is greater than that in the plains
  3. (c)The blood pressure increases at high altitudes
  4. (d)The blood pressure decreases at high altitudes

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