Group the given figures into three classes using each figure only once.
A.
1,4,7 ; 2,5,9 ; 3,8,6
B.
2,6,9 ; 1,4,7 ; 5,8,3
C.
1,4,7 ; 2,3,6 ; 5,8,9
D.
3,5,1 ; 4,7,8 ; 6,2,9
Correct answer is C
5, 8, 9 are objects having both base as well as upper lid.
2, 3, 6 are objects having base but not upper lid.
1, 4, 7 tare objects which have neither a base nor an upper lid attached to them.