Opportunity costs exist because
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Which type of permanent tissue helps the aquatic plants to float?
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Spiders belong to which class of animals?
Who has won the most number of Gold Medals in Olympics?
Which among the following is called as 'Land of the midnight Sun'?
In which battle was Siraj ud–Daulah defeated by Lord Clive?
If the length of the shadow of a vertical pole be √3 times the height of the pole, the angle of elevation of the sun is:
If (secA - tanA)2 = x, then the value of x is