Physics
According to the quantum theory of light, the energy of light is carried in discrete units are called

Electrons
Photons
Photoelectrons
Protons

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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 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
An integrated circuit is more advantages than a coventional circuit because

All listed here
A faulty part of a conventional circuit may be difficult to locate and repair
If a part of the integrated circuit fails the entire circuit is simply replaced
They make the electric equipments more reliable and easier for servicing

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