When a bullet is fired from a gun, the gun moves in the opposite direction. This illustrates Newton's
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Person who is colour-blind cannot distinguish between
Polio is a disease caused by which of the following?
Which of the following three R's are regarded as environment friendly?
Which one of the following papers was edited by Gandhiji in South Africa?
How many days moon takes to revolve around the earth?
The Moon takes about 27.3 days to perform one complete orbit around the Earth.
Where was Guru Nanak Dev (the originator of Sikh religion) born?
_________ software are freely available and can be edited and customized by anyone.