Which of the following vitamins help in the absorption of calcium?
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The tree species most commonly used in social forestry is
What is the name of ecologically clean rocket developed by Russia based space research center?
What do you mean by 'Density of Population'?
Which country was designated as the major defence partner of USA in December, 2016?
Which country built the Bird's Nest Stadium for 2008 Summer Olympics?
Salination of soil is caused by
To cover a certain distance with a speed of 60 km/hr, a train takes 15 hours. If it covers the same distance in 12 hours, what will be its speed?