Select a suitable figure from the four alternatives that would complete the figure matrix.

In each row, the central part of the first figure rotates either 90 ^o CW or 90 ^o ACW to form the central part of the second figure and the central part of the first figure rotates through 180 ^o to form the central part of the third figure. Also, in each row, there are 3 types of side elements - rectangles, circles and triangles.