Physics
Mirage is due to:

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

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

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

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