Methane an air pollutant is produced ______.
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Who was the first Indian astronomer to calculate the time taken by earth to orbit the sun?
The liberation of oxygen during photosynthesis is due to __________
If speed of rotation of the earth increases, the weight of the body
Which country is the largest producer of Guava?
Official Currency of Nepal is called ________
Which of the following is not among the three different forms of 'if' statement?
Which one of the following does not belong to the group?