Grouping of Images - Verbal and Reasoning

Directions to SolveIn each of the following questions, group the given figures into three classes using each figure only once.
Q1:

Group the given figures into three classes using each figure only once.

A 1,2,3 ; 4,5,8 ; 6,7,9

B 1,5,6 ; 2,3,4 ; 7,8,9

C 1,3,5 ; 2,4,8 ; 6,7,9

D 1,4,7 ; 2,5,8 ; 3,6,9

ANS:B - 1,5,6 ; 2,3,4 ; 7,8,9

Explanation: 1, 5, 6 have two similar elements, one inside the other. 2, 3, 4 contain straight lines each dividing, the figure into two equal parts. 7, 8, 9 have one element placed inside a different element.