16.Even though Pluto is usually the farthest planet, its path is highly elliptical, crossing inside the path of some other planets. As a result, for a period of twenty years from 1979 the farthest planet is not Pluto but

17.If Indias population continues to grow at the rate of 2 % per annum, the population will be doubled of its present size in next

18.Which is the most literate district after Kerala ?

19.Maharashtrian Plateau is made up of

20.The sunspots cause