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All figures of class A are closed while figures of class B are open from one side.

As per the given figure in above question, it is clear that
In each subsequent figure the leftmost design moves to the right most position.
Thus , figure ( 4 ) will come on the place of ? in question figure .As shown in answer figures .

According to above given question figures , we can say that
From Problem Figures (1) to (2) the opposite designs interchange positions and move away from the centre. From Problem Figure (2) to (3) the designs again move to the centre. Therefore, from problem figure (3) to Answer figure the opposite designs would interchange positions and move away from the centre.
Thus , figure ( 1 ) will come on the place of ? in question figure .As shown in answer figures .

According to above given question figures , we can say that
In each subsequent figure one chord of circle becomes straight line. The process is continued in anticlockwise direction.
Hence , figure ( 2 ) will come on the place of ? from answer figures .

As per the given figure in above question, it is clear that
In each subsequent figure the design rotates through 90° in anticlockwise direction.
Hence , figure ( 2 ) will come on the place of ? from answer figures .

On the basis of given figures in above question , we can see that
In each subsequent figure the designs move one sector in anticlockwise direction.
Thus , figure ( 1 ) will come on the place of ? in question figure .As shown in answer figures .

As per the given figure in above question, it is clear that
In each subsequent figure one dot is added and alternately dots become white. Again, in each subsequent figure one arrow is deleted.
Hence , figure ( 3 ) will come on the place of ? from answer figures .

On the basis of given figures in above question , we can see that
In each subsequent figure one side of square is converted into a curve.
Therefore , figure ( 3 ) will come on the place of ? in question figure .As shown in answer figures .

As per the given figure in above question, it is clear that
From first figure to second figure the shaded part of the solitary square at the left rotates through 90° while four small squares each are added to upper and lower arms and a small circle appears in the shaded squares.
Clearly , answer figure ( 1 ) will come on the place of ? in question figure .

Arrow moves anti clock wise at 45 degree.