Basic General Knowledge
The Heads of Government of the countries which are members of the Commonwealth meet

as and when necessary
at intervals of three years
once a year
biannually

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Basic General Knowledge
The main objectives of the UN are

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

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Basic General Knowledge
To produce sound it is necessary that

the source should execute transverse vibrations
the vibrations of source are not necessary
the source should execute longitudinal vibrations
the source may execute any type of vibrations

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