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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Basic General Knowledge
Vijayalakshmi Pandit was

the first Indian women Ambassador to Moscow
All of these
the first women minister of an Indian state (UP)
the first women to become president of the UN General Assembly

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