Physics
Why does bleeding occur through the nose in high mountainous regions ?

The blood pressure fluctuates and finally decreases drastically
The blood pressure of a person increases at high altitudes
The pressure of blood in capillaries is greater than the outside pressure
The pressure at high altitudes is greater than that on the plains

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Physics
Mirage is due to:

Depletion of ozone layer in the atmosphere
Equal heating of different parts of the atmosphere
Magnetic disturbances in the atmosphere
Unequal heating of different parts of the atmosphere

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