How many of the cubes have at most faces painted?

On the basis of above given question figures , we can see that
In each subsequent figure the line segment rotates 90° clockwise and two arrow heads are added to both ends, one to each end.
Hence , required answer will be option B .As shown in above given answer figures .

From first unit to second unit the triangle rotates through 90° clockwise and moves to the side of square and a similar triangle appears on the opposite side.

The element in the first two figure changes its position diagonally and central figure remains same.

As per the given figure in above question, it is clear that
In each subsequent figure one line segment is added in a set order.
Thus , figure ( 3 ) will come on the place of ? in question figure .As shown in answer figures .

Answer C

On the basis of given figure in above question,we get
From first figure to second figure the upper figure is inverted and the lower figure moves inside it. The line segments of the upper figure are arranged in a set order.
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 vertical and two horizontal line segments are added in a set order.
Hence , figure ( 4 ) will come on the place of ? from answer figures .

All the elements of the top row moves to second row, second row elements move to third row and third row elements move to first row.

As per the given above question figures , we can see that
In each subsequent figure the ribs of leaf are inverted and some parts of flower are deleted.
Therefore , figure ( 4 ) will come on the place of ? in question figure .As shown in answer figures .