Group the given figures into three classes using each figure only once.
A.
1,5,9 ; 2,7,8 ; 3,4,6
B.
1,5,6 ; 4,7,8 ; 2,3,9
C.
2,4,9 ; 6,7,8 ; 1,3,5
D.
3,7,8 ; 4,5,9 ; 1,2,6
Correct answer is C
2, 4, 9 have two similar elements intersecting each other.
6, 7, 8 have two different elements one placed inside the other.
1, 3, 5 have two different elements intersecting each other.