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: Option 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.