Group the given figures into three classes using each figure only once.
A.
2,4,7 ; 1,6,9 ; 3,5,8
B.
1,3,5 ; 2,6,7 ; 4,8,9
C.
1,5,7 ; 2,3,6 ; 4,8,9
D.
1,3,5 ; 2,4,7 ; 6,8,9
Correct answer is A
1, 6, 9 are figures which are half shaded by slanting lines.
2, 4, 7 are all divided into equal parts (either three or four parts) by straight lines and also have a black circle at the centre.
3, 5, 8 have similar designs and have their four corners shaded black.