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

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

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Physics
Scalar Quantities are

Physical quantities which have magnitude only and direction
Physical quantities which have magnitude only and no direction
Physical quantities which have no magnitude and no direction
Physical quantities which have no magnitude only and only direction

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