If you climb a high mountain without proper equipment, your nose will start to bleed. Why?

Due to dehydration.

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Due to radiation from sun.

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Due to hyperthermia.

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Due to pressure difference.

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Solution

The correct option is D Due to pressure difference.
As we go higher in altitude, the atmospheric pressure decreases. At mountain top, the pressure outside becomes very less as compared to the blood pressure in our body. Due to this pressure difference, blood vessels present in the nose may burst, which results in nose bleeding.

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