Question

Assertion (A): Mountaineers usually suffer from nose-bleeding at high altitudes. Reason (R): Atmospheric Pressure decreases with altitude.

• A. Both (A) and (R) are true and (R) is correct explanation of (A).
• B. (A) is true but (R) is false.
• C. Both (A) and (R) are true and (R) is not correct explanation of (A).
• D. (A) is false but (R) is true.

Answer 1

The correct option is A Both (A) and (R) are true and (R) is correct explanation of (A).

The pressure inside our body remains same at higher altitude, but atmospheric pressure decreases. So the net pressure acting on the body is in the outward direction which can lead to damage of delicate tissues and can cause nose bleeding.