Basic General Knowledge
Which of the following inventions were done by Thomas Alva Edison?

Carbon telephone transmitters
Phonograph C (Gramophone) and microphone
All of these
Incandescent lamp

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Basic General Knowledge
What was the purpose of establishment of NATO?

None of these
To maintain and develop individual and collective capacity to resist armed attack
To defend economic and trade interests of the developing nations of the world
TO provide collective defence and economic cooperation in south-east Asia

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