Physics
Choose the most appropriate answer: Sir CV Raman was awarded Noble Prize for his work connected with which of the following phenomenon of radiation?

Scattering
Polarization
Interference
Diffraction

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

The blood pressure of a person increases at high altitudes
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

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