Group the given figures into three classes using each figure only once.
A.
1,3,9 ; 2,5,8 ; 4,6,7
B.
1,5,8 ; 4,6,7 ; 2,3,9
C.
2,5,9 ; 1,3,8 ; 2,6,7
D.
1,8,9 ; 4,6,7 ; 2,3,5
Correct answer is B
1, 5, 8 are all open figures bisected by a line segment.
4, 6, 7 are all closed figures touching a line segment.
2, 3, 9 are all closed figures intersected by a line.