Basic General Knowledge
The main objectives of the UN are

to develop friendly relations among nations
to work together to remove poverty, disease and illiteracy and encourage respect for each other's rights of basic freedom.
All of these
to maintain peace and security in the world

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Basic General Knowledge
Primary rainbow is formed when light suffers

either one or two internal refractions before emerging out of the drop
one internal refractions before emerging out of the drop
two internal refractions before emerging out of the drop
no internal refraction

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