In a series of figures is given which can be grouped into classes: Select the groups into which the figures can be classifled?

Options

A. 1, 4, 7, 2, 5, 6, 3, 8, 9
B. 1, 3, 7, 2, 6, 8, 4, 5, 9
C. 1, 4, 7, 2, 6, 8, 3, 5, 9
D. 1, 4, 7, 2, 8, 9, 3, 6, 5

Answer

C

Explanation

Figures (1), (4) and (7) `rarr` Each figure is shaded.
Figures (2), (6) and (8) `rarr` Each figure is shaded with straight lines.
Figures (3), (5) and (9) `rarr` Each figure is shaded with oblique lines.