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

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

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

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

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

Explanation: 1, 3, 9 have one element placed inside a different element. 2, 5, 6 contain two mutually perpendicular lines dividing the figure into four parts. 4, 7, 8 have two similar elements (unequal in size) attached to each other.