31.Given below are two statements labelled as Assertion (A) and Reason (R). In the context of the two statements, which of the following is correct ?Assertion (A) : Ionospheric layers reflect radio waves and so permit long distance communication.Reason (R) : Some of the atoms and molecules in the ionospheric layers are ionised and behave like a mirror so to radio waves.

32.Which of the following groups represent Karst regions ?

33.Indira Gandhi Canal originates from

34.Which state has proportionately the large area covered by forests ?

35.Which of the following is correctly matched ?