Physics
Assertion (A) : As we move to higher altitudes, at times nose bleeding occurs.
Reason (R) : The reason for nose bleeding is excess of atmospheric pressure over the blood pressure.
- both A and R are true and R is the correct explanation of A
- both A and R are true and R is not the correct explanation of A
- assertion is false but reason is true
- assertion is true but reason is false
Fluids Pressure
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Answer
assertion is true but reason is false
Explanation
Assertion (A) is true because this is a well-known phenomenon in which at high altitudes, sometimes nose bleeds when atmospheric pressure decreases significantly.
Reason (R) is false because at high altitudes, atmospheric pressure drops, but blood pressure inside the body remains the same. So now, blood pressure > atmospheric pressure, and the capillaries in the nose may burst, leading to nose bleeding.
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