Group the given figures into three classes using each figure only once.
A.
1,3,5 ; 2,6,9 ; 4,7,8
B.
2,3,4 ; 5,6,8 ; 9,1,7
C.
1,3,5 ; 2,6,8 ; 4,7,9
D.
3,2,4 ; 6,5,8 ; 7,9,1
Correct answer is C
1, 3, 5 are figures having partially or completely curved boundaries.
2, 6, 8 are all triangles.
4, 7, 9 are all quadrilaterals.