Which of the figures given in options completes the figure matrix given below? [Figure: A 3 x 3 matrix. Row 1: three squares divided into eight triangles with shaded triangles in different positions. Row 2: small triangle and arrow-like shapes (a black upward triangle, grey right-pointing and left-pointing triangles, black downward triangles). Row 3: a circle with a quarter removed in two different orientations, and the last cell is '?'. Options (a) to (d) are circles with a quarter cut out in different orientations.]