Which is the closest star to our solar system?
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June 21 marks the winter solstice in the _________ Hemisphere.
Study of earth is known as
What is the maximum number of Members of the Rajya Sabha?
What is the reason for formation of Mirage in desert?
The absolute refractive index of air is
In a food chain, what is the difference between primary consumers and secondary consumers?
Black soil is also known by which of the following name ?