Group the given figures into three classes using each figure only once.
A.
1,4,7 ; 2,5,8 ; 3,6,9
B.
1,4,7 ; 2,5,9 ; 3,6,7
C.
1,3,4 ; 2,5,8 ; 6,7,9
D.
1,2,3 ; 4,5,6 ; 7,8,9
Correct answer is A
1, 4, 7 are all (two-dimensional) quadrilaterals.
2, 5, 8 are all three-dimensional figures.
3, 6, 9 are all (two-dimensional) triangles.